@article{100034, author = {Karel \v Cern\'y}, title = {O minimumakh binarnykh bikvadratnykh form}, journal = {Czechoslovak Mathematical Journal}, volume = {02}, year = {1952}, pages = {1-56}, zbl = {0048.03201}, mrnumber = {0052463}, language = {ru}, url = {http://dml.mathdoc.fr/item/100034} }
Černý, Karel. О минимумах бинарных биквадратных форм. Czechoslovak Mathematical Journal, Tome 02 (1952) pp. 1-56. http://gdmltest.u-ga.fr/item/100034/