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@article{MV_1969_21_1_a2, author = {{\DJ}. Kurepa}, title = {A remark on equivalence relation}, journal = {Matemati\v{c}ki vesnik}, pages = {27 }, publisher = {mathdoc}, volume = {21}, number = {1}, year = {1969}, url = {http://geodesic.mathdoc.fr/item/MV_1969_21_1_a2/} }
Đ. Kurepa. A remark on equivalence relation. Matematički vesnik, Tome 21 (1969) no. 1, p. 27 . http://geodesic.mathdoc.fr/item/MV_1969_21_1_a2/