@article{NSJOM_1980_10_Nonea_18,
     author = {\v{S}e\v{s}elja Branimir},
     title = {Characterization of fuzzy 

 equivalence relations and of fuzzy congruence relations on algebras},
     journal = {Novi Sad Journal of Mathematics},
     pages = {153-160},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_18/}
}