Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1988_24_9_a27, author = {V. V. Novikov}, title = {On a qualitative property of solutions of biharmonic equation on plane}, journal = {Differencialʹnye uravneni\^a}, pages = {1648}, publisher = {mathdoc}, volume = {24}, number = {9}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1988_24_9_a27/} }
V. V. Novikov. On a qualitative property of solutions of biharmonic equation on plane. Differencialʹnye uravneniâ, Tome 24 (1988) no. 9. http://geodesic.mathdoc.fr/item/DE_1988_24_9_a27/