Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1990_47_3_a18, author = {Chan Tkhu Kha}, title = {A~nonselfadjoint operator pencil}, journal = {Matemati\v{c}eskie zametki}, pages = {133--135}, publisher = {mathdoc}, volume = {47}, number = {3}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1990_47_3_a18/} }
Chan Tkhu Kha. A~nonselfadjoint operator pencil. Matematičeskie zametki, Tome 47 (1990) no. 3, pp. 133-135. http://geodesic.mathdoc.fr/item/MZM_1990_47_3_a18/