Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1971_198_1_a2, author = {V. M. Brodskii}, title = {On operator nodes and their characteristic functions}, journal = {Doklady Akademii Nauk}, pages = {16--19}, publisher = {mathdoc}, volume = {198}, number = {1}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a2/} }
V. M. Brodskii. On operator nodes and their characteristic functions. Doklady Akademii Nauk, Tome 198 (1971) no. 1, pp. 16-19. http://geodesic.mathdoc.fr/item/DAN_1971_198_1_a2/