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@article{MZM_1987_41_1_a0, author = {\'E. I. Kovalevskaya}, title = {Jointly extremal manifolds}, journal = {Matemati\v{c}eskie zametki}, pages = {3--8}, publisher = {mathdoc}, volume = {41}, number = {1}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_41_1_a0/} }
É. I. Kovalevskaya. Jointly extremal manifolds. Matematičeskie zametki, Tome 41 (1987) no. 1, pp. 3-8. http://geodesic.mathdoc.fr/item/MZM_1987_41_1_a0/