Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1961__11_1_a5, author = {Medekov\'a, Tatiana}, title = {O s\'u\v{c}te dvoch line\'arnych podpriestorov}, journal = {Mathematica slovaca}, pages = {57--62}, publisher = {mathdoc}, volume = {11}, number = {1}, year = {1961}, zbl = {0104.14902}, language = {sl}, url = {http://geodesic.mathdoc.fr/item/MASLO_1961__11_1_a5/} }
Medeková, Tatiana. O súčte dvoch lineárnych podpriestorov. Mathematica slovaca, Tome 11 (1961) no. 1, pp. 57-62. http://geodesic.mathdoc.fr/item/MASLO_1961__11_1_a5/