^“аз”, inБългарски тълковен речник [Bulgarian Explanatory Dictionary] (in Bulgarian), fourth edition, Sofia: Nauka i Izkustvo,2005, page20
^Georgiev, Vladimir I., editor (1971), “аз”, inБългарски етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 1 (А – З), Sofia: Bulgarian Academy of Sciences Pubg. House,→ISBN, page 5
^Mate Kapović,Reconstruction of Balto-Slavic Personal Pronouns (2006)
^Georgiev, Vladimir I., editor (1971), “аз”, inБългарски етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volume 1 (А – З), Sofia: Bulgarian Academy of Sciences Pubg. House,→ISBN, page 5
^Trubachyov, Oleg, editor (1974), “*azъ”, inЭтимологический словарь славянских языков [Etymological dictionary of Slavic languages] (in Russian), numbers 1 (*a – *besědьlivъ), Moscow: Nauka, page100
“аз”, inРечник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences,2014
“аз”, inРечник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian),Chitanka,2010
Matsiev, Akhmat G. (1961),Чеченско-русский словарь / Нохчийн-оьрсийн словарь [Chechen-Russian dictionary] (in Russian), Moscow: State Publishing House of Foreign and Ethnicity Dictionaries, page24
Often paired and contrasted withэз(ez,“omen,fate”). Morphologically it looks like theMongolic defective verb*a-(“be”) +-з(-z) (ᠵᠠ(ǰa) ) suffix, but the semantics are unclear.