Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1980_1_a1, author = {A. G. Gein}, title = {Projections of two-step nilpotent {Lie} algebras}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {12--15}, publisher = {mathdoc}, number = {1}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1980_1_a1/} }
A. G. Gein. Projections of two-step nilpotent Lie algebras. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1980), pp. 12-15. http://geodesic.mathdoc.fr/item/IVM_1980_1_a1/