Finka's most significant work was in the fields of Croatian and Slavic dialectology and toponymy. With Stjepan Babić and Milan Moguš, he co-authored Hrvatski pravopis ("Croatian Orthography", 1st ed. 1971).
Finka spent most of his scientific career working at the Institute of Croatian Language and Linguistics, serving as its director from 1973 to 1977. He was a full member of the Croatian Academy of Sciences and Arts since 1988.
- "Akademik Božidar Finka". info.hazu.hr (in Croatian). Croatian Academy of Sciences and Arts. Retrieved 2 May 2014.
- "Božidar Finka (1925–2000)" (PDF). Rasprave (in Croatian) (Institute of Croatian Language and Linguistics) 26 (1): 395–403. July 2001. Retrieved 2 May 2014.
- Finka, Božidar at enciklopedija.hr (Croatian)