See also the home page of the Legenda book series Studies In Linguistics

SeriesExtentYearAuthorTitle
SIL 3160pp2006David HornsbyRedefining Regional French
SIL 1230pp2002ed Anna Laura Lepschy,
Arturo Tosi
Multilingualism in Italy Past and Present
SIL 2212pp2006ed Anna Laura Lepschy,
Arturo Tosi
Rethinking Languages in Contact