Não informado. (1981). Zbornik Radova Prirodno-Matematickog Fakulteta. University of Novi Sad, Institute of Mathematics, Faculty of Science.
Chicago (17e ed.) BronvermeldingNão informado. Zbornik Radova Prirodno-Matematickog Fakulteta. Novi Sad, Iugoslavia: University of Novi Sad, Institute of Mathematics, Faculty of Science, 1981.
MLA (8e ed.) BronvermeldingNão informado. Zbornik Radova Prirodno-Matematickog Fakulteta. University of Novi Sad, Institute of Mathematics, Faculty of Science, 1981.
Let op: Deze citaties zijn niet altijd 100% accuraat.