I am looking for dialectological works for the area of former Yugoslavia, though I am most interested in Serbia and Montenegro. I can't really find any, other that the kind of maps on wikipedia showing the division between Štokavian,Čakavian, Kajkavian, Torlak(ian), and these maps aren't particularly useful/detailed.
When writing my dissertation about Language and Identity I found these two references:
Bugarski, R. (1997). Lengua, nacionalismo y la desintegración de Yugoslavia. Revista de Antropología Social, 6, 13-27. http://revistas.ucm.es/index.php/RASO/article/download/RASO9797110013A/10187
Greenberg, M. L. (April, 1996). The role of language in the creation of identity: Myths in linguistics among the people a of the former Yugoslavia. Article presented at the seminary Reinvention of Tradition, University of Kansas. http://kuscholarworks.ku.edu/dspace/bitstream/1808/969/1/yugoslav_myths96.pdf
Maybe they can help you!
With some help from Rocío, I have found a fairly useful resource (in the bibliography of Greenberg). The reference in question is Pavle Ivić (1958) Die serbokroatischen Dialekte:ihre Struktur und Entwicklung, Volume 1. It can be found on Google Books, but it's not available for preview. However, you might find a copy at a library, I have.