Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1978_238_1_a3, author = {M. M. Lavrent'ev and B. Imomnazarov}, title = {Strongly positive operators}, journal = {Doklady Akademii Nauk}, pages = {23--25}, publisher = {mathdoc}, volume = {238}, number = {1}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1978_238_1_a3/} }
M. M. Lavrent'ev; B. Imomnazarov. Strongly positive operators. Doklady Akademii Nauk, Tome 238 (1978) no. 1, pp. 23-25. http://geodesic.mathdoc.fr/item/DAN_1978_238_1_a3/