Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1981_30_5_a6, author = {V. A. Khatskevich}, title = {Invariant subspaces of focusing plus-operators}, journal = {Matemati\v{c}eskie zametki}, pages = {695--702}, publisher = {mathdoc}, volume = {30}, number = {5}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1981_30_5_a6/} }
V. A. Khatskevich. Invariant subspaces of focusing plus-operators. Matematičeskie zametki, Tome 30 (1981) no. 5, pp. 695-702. http://geodesic.mathdoc.fr/item/MZM_1981_30_5_a6/