-U. Weinreich/W. Labov/M. I. Herzog, Fondamenti empirici per una teoria del cambiamento linguistico, in Lehmann W.P. e Malkiel Y. (eds.), Nuove tendenze della linguistica storica, Bologna, il Mulino, 1977, 101-202.

- Romano Lazzeroni, Il mutamento linguistico, in Romano Lazzeroni (ed.), Linguistica storica, Roma, La Nuova Italia Scientifica, 1987, 13-54, (now available also in the cheaper Collana Aulamagna, Roma, Carocci, 2017).
- W.P. Lehmann, Manuale di linguistica storica, Bologna, il Mulino, 1998, chapters 10-15.

Further bibliographic references will be provided during the course, taking into account regularly attending students' needs and known languages.
Further teaching material provided by the teacher will be available online.

Reference texts for students who cannot attend on a regular basis:

- Marco Mancini (ed.), Il cambiamento linguistico, Roma, Carocci, 2003.

- Romano Lazzeroni (ed.), Linguistica storica, Roma, La Nuova Italia Scientifica, 1987 (now available also in the cheaper Collana Aulamagna, Roma, Carocci, 2017).