@article{MV_1970_22_2_a10,
     author = {M. S. Popadi\'c},
     title = {On inductive quadruples},
     journal = {Matemati\v{c}ki vesnik},
     pages = {204 },
     year = {1970},
     volume = {22},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/MV_1970_22_2_a10/}
}