You can
-obtain his death certificate
-obtain his marriage certificate
-obtain his divorce papers if he was married legally at least twice
-obtain his immigration /visa/citizenship information
if you are a direct descendant. These documents will provide you with accurate information on his birth date, place of origin...
"anyone with information on the surname globarevic in montenegro...there isnt a trace of any globarevics in australia online"
Information from Montenegrin Ethnic Association of Australia:
surname - locations
Globarević - Draževina (Podgorica); Sinjac and Vranjina by the lake Skadar; Podgorica; Nikšić
Globarevići, brotherhood in the village of Begova Glavica - Lješanska Nahija
http://www.montenegro.org.au/Serbian Genealogy Society SGS "Rodoslovlje"
http://www.rodoslovlje.com/en