@article{PIM_1978_N_S_23_37_a26,
     author = {Janez U\v{s}an and Zoran Stojakovi\'c},
     title = {On {A} {System} {Of} {Functional} {Equations} {On} {Quasigroups}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {223 },
     publisher = {mathdoc},
     volume = {_N_S_23},
     number = {37},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/PIM_1978_N_S_23_37_a26/}
}