Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_2_a18, author = {V. A. Koldorkina}, title = {The solutions of the equation $\Delta \Delta u=f$ in a piecewise smooth domain}, journal = {Differencialʹnye uravneni\^a}, pages = {374--376}, publisher = {mathdoc}, volume = {8}, number = {2}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_2_a18/} }
V. A. Koldorkina. The solutions of the equation $\Delta \Delta u=f$ in a piecewise smooth domain. Differencialʹnye uravneniâ, Tome 8 (1972) no. 2, pp. 374-376. http://geodesic.mathdoc.fr/item/DE_1972_8_2_a18/