@article{MV_1968_20_2_a4,
     author = {V. Hval},
     title = {O permanente prostranstvennoj matricy},
     journal = {Matemati\v{c}ki vesnik},
     pages = {173 },
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/MV_1968_20_2_a4/}
}