B. Azencott, R. Aida, S. Kusuoka, S. Stroock, and D. , On the support of Wiener functionals, Asymptotic problems in probability theory : Wiener functionals and asymptotics, Seminaire de Probabilités XVI. Supplément: Géométrie différentielle stochastique (Lect. Notes MathBA1] Ben Arous, G.: Flots et séries de Taylor stochastiques, pp.237-284, 1982.

B. Arous, G. Gradinaru, M. Ba-l-]-ben-arous, G. Ledoux, and M. , Singularities of hypoelliptic Green functions, en préparation Grandes déviations de Freidlin-Wentzell en norme hölderienne, Seminaire de Probabilités XXVIII (Lect. Notes Math, pp.293-299, 1994.

B. Arous, G. Léandre, and R. , Décroissance exponentielle du noyau de la chaleur sur la diagonale I,II, Probab. Th. Rel, pp.175-202, 1991.

B. Baldi, P. , B. Arous, G. Kerkyacharian, and G. , Large deviations and Strassen law in Hölder norm, Stoch, Proc. Appl. 42, pp.171-180, 1992.

B. Beals, R. Gaveau, B. Greiner, and P. C. , Lecture at the Seminar on Analysis, 1993.

B. Baldi, P. Roynette, and B. , Some exact equivalents for the Brownian motion in Hölder norm, pp.457-484, 1992.

Z. Ciesielski, On the isomorphisms of the spaces H ? and m, Bull. Acad. Pol. Sci, vol.8, pp.217-222, 1960.

. Ca, F. M. Castell, L. Gall, and J. , Asymptotic expansion of stochastic flows Green function, capacity and sample paths properties for a class of hypoelliptic diffusions processes, Probab. Th. Rel. Fields, vol.96, pp.225-239, 1989.

D. Gupta, S. Eaton, M. L. Olkin, I. Perlman, M. Savage et al., Inequalities on the probability content of convex regions for elliptically contoured distributions, Proceedings of the Sixth Berkeley Symposium of Math. Statist. Prob. II, pp.241-267, 1970.

F. Folland and G. B. , A fundamental solution for a subelliptic operator, Bulletin of the American Mathematical Society, vol.79, issue.2, pp.73-99, 1989.
DOI : 10.1090/S0002-9904-1973-13171-4

B. Arous, G. Gradinaru, M. Ba-le-]-ben-arous, G. Léandre, R. Blumenthal et al., Singularities of hypoelliptic Green functions, in progress Décroissance exponentielle du noyau de la chaleur sur la diagonale I,II, Probab, Th. Rel. Fields 90 Markov processes and potential theory, pp.175-202, 1968.

B. Beals, R. Gaveau, B. Greiner, and P. C. , Lecture at the Seminar on Analysis, 1993.

. Bi and M. Biroli, The Wiener Test for Poincaré-Dirichlet Forms Classical and Modern Potential Theory and Applications, Principe du maximum, inégalité de Harnack et unicité duprobì eme de Cauchy pour les opérateurs elliptiques dégénérés, pp.93-104, 1969.

. Ca, F. M. Castell, L. Gall, and J. , Asymptotic expansion of stochastic flows Green function, capacity and sample paths properties for a class of hypoelliptic diffusions processes, Probab. Th. Rel. Fields, vol.96, pp.225-239, 1989.

G. B. Folland, A fundamental solution for a subelliptic operator, Bulletin of the American Mathematical Society, vol.79, issue.2, pp.373-376, 1973.
DOI : 10.1090/S0002-9904-1973-13171-4

F. Fefferman, C. L. Sánchez-calle, and A. , Fundamental Solutions for Second Order Subelliptic Operators, The Annals of Mathematics, vol.124, issue.2, pp.247-272, 1986.
DOI : 10.2307/1971278

G. Gallardo and L. , Capacités, mouvement brownien etprobì eme de l'´ epine de Lebesgue sur les groupes de Lie nilpotents, Probability measures on groups, Proceedings of the Conference at Oberwolfach 1981 (Lect. Notes Math, pp.96-120, 1982.
DOI : 10.1007/bfb0093222

. Ga and B. Gaveau, Principe de moindre action, propagation de la chaleur et estimées sous-elliptiques sur certains groupes nilpotents, Acta Math, pp.96-153, 1977.

. Gr1 and P. C. Greiner, A fundamental solution for a nonelliptic partial differential operator, Canad, Jour. Math, vol.31, pp.1107-1120, 1979.

P. C. Greiner, On second order hypoelliptic differential operators and the ?????-Neumann problem, Proceedings of Workshop at, pp.134-142, 1990.
DOI : 10.1007/978-3-322-86856-5_22

G. Greiner, P. Stein, and E. M. , On the solvability of some differential operators of type b , In: Several complex variables, Proceedings of the conference at Cortona, pp.106-165, 1976.

K. Kusuoka, S. Stroock, and D. W. , Applications of the Malliavin calculus, Part III, J. Fac. Sci. Univ. Tokyo, vol.34, pp.391-442, 1987.

K. Kusuoka, S. Stroock, and D. W. , Long Time Estimates for the Heat Kernel Associated with a Uniformly Subelliptic Symmetric Second Order Operator, The Annals of Mathematics, vol.127, issue.1, pp.165-189, 1988.
DOI : 10.2307/1971418

J. Jerison, D. Sánchez-calle, and A. , Estimates for the heat kernel for a sum of squares of vector fields, Math. J, vol.35, pp.835-854, 1986.

J. Jerison, D. Sánchez-calle, and A. , Subelliptic, second order differential operators, Lect. Notes Math, vol.24, issue.5, pp.46-77, 1985.
DOI : 10.1007/BF01388721

J. La-]-lamperti, Wiener's test and Markov chains, Journal of Mathematical Analysis and Applications, vol.6, issue.1, pp.58-66, 1963.
DOI : 10.1016/0022-247X(63)90092-1

R. Le-]-léandre, Volume des boules sous-riemanniennes et explosion, Seminaire de Probabilités XXIII (Lect. Notes Math, pp.426-447, 1989.

N. Nagel, A. Stein, E. M. Wainger, S. Pitman, J. W. Yor et al., Balls and metrics defined by vector fields I. Basic properties, Acta Math A decomposition of Bessel bridges[Sa] Sánchez-Calle, A.: Fundamental solutions and geometry of the sum of square of vector fields, Z. Wahrscheinlichkeitstheor. Verw. Geb, vol.155, issue.59, pp.103-147, 1982.

N. Wiener, The Dirichlet Problem, Journal of Mathematics and Physics, vol.3, issue.3, pp.127-146, 1924.
DOI : 10.1002/sapm192433127

B. Baldi, P. Roynette, and B. , Some exact equivalents for the Brownian motion in Hölder norm, pp.457-484, 1992.

B. Arous, G. Gradinaru, M. Ba-g-l-]-ben-arous, G. Gradinaru, M. Ledoux et al., Normes hölderiennes et support des diffusions Hölder norms and the support theorem for diffusions, Ann. Inst: Grandes déviations de Freidlin-Wentzell en norme hölderienne, C. R. Acad. Sci. Paris, vol.316, issue.1583, pp.283-286, 1993.

B. Arous, G. Léandre, and R. , Décroissance exponentielle du noyau de la chaleur sur la diagonale I,II, Probab. Th. Rel, pp.175-202, 1991.

J. M. Bi-]-bismut, Mécanique aléatoire, Lect. Notes Math, vol.866, 1981.

Z. Ciesielski, On the isomorphisms of the spaces H ? and m, Bull. Acad. Pol. Sci, vol.8, pp.217-222, 1960.

D. Gupta, S. Eaton, M. L. Olkin, I. Perlman, M. Savage et al., Inequalities on the probability content of convex regions for elliptically contoured distributions, Proceedings of the Sixth Berkeley Symposium of Math. Statist. Prob. II, pp.241-267, 1970.

M. Millet, A. Sanz-solé, and M. , A simple proof of the support theorem for diffusion processes, Seminaire de Probabilités XXVIII (Lect. Notes Math, pp.36-48, 1994.
DOI : 10.1002/cpa.3160250603

P. Pitt and L. , A Gaussian Correlation Inequality for Symmetric Convex Sets, The Annals of Probability, vol.5, issue.3, pp.470-474, 1977.
DOI : 10.1214/aop/1176995808

. Sc and A. Scott, A note on conservative confidence regions for the mean value of multivariate normal, Math. Stat, vol.38, pp.278-280, 1967.

. Si, Z. Sidak, D. W. Stroock, and S. R. Varadhan, Rectangular confidence regions for the means of multivariate normal distributions On the support of diffusion processes with applications to the strong maximum principle, Proceedings of Sixth Berkeley Symposium of Math. Statist. Prob. III, pp.626-633, 1967.

L. A. Shepp and O. Zeitouni, A Note on Conditional Exponential Moments and Onsager-Machlup Functionals, The Annals of Probability, vol.20, issue.2, pp.652-654, 1992.
DOI : 10.1214/aop/1176989796