Abstract : The ob jective of the thesis is to generate demonstrative descriptions and deﬁnite de- scriptions that refer to new referents, by carrying out a corpus study of 10,000 deﬁnite and demonstrative NPs. The ﬁrst part of the thesis is a state-of-the-art overview and the second shows the results of the present work. The ﬁrst chapter reviews some theoretical and empirical results on referential NPs and shows the limitations of these analyses. The second chapter discusses the problems involved in the generation of referential expres- sions, and the third presents the concepts behind corpus linguistics and the processing of digital corpora. The ﬁrst part concludes by showing the relationships between the above three domains. The ﬁfth chapter of this thesis presents the corpus study that was carried out, from automated pre-processing to the extraction of results. The sixth ans seventh chapters discuss ﬁndings on bridging and coreferential NPs and two extensions to the Gardent-Striegnitz algorithm. The ﬁnal chapter presents the semantic and syntactic con- straints on the choice of determinant in referring NPs which were identiﬁed through the corpus study.