@article{MV_1968_20_3_a16,
     author = {B. P. Alimpi\'c},
     title = {On models of certain formulas of the predicate calculus of first order},
     journal = {Matemati\v{c}ki vesnik},
     pages = {347 },
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/MV_1968_20_3_a16/}
}