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@article{DAN_1965_165_1_a9, author = {S. I. Pokhozhaev}, title = {Eigenfunctions of the equation $\Delta u+\lambda f(u)=0$}, journal = {Doklady Akademii Nauk}, pages = {36--39}, publisher = {mathdoc}, volume = {165}, number = {1}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_1_a9/} }
S. I. Pokhozhaev. Eigenfunctions of the equation $\Delta u+\lambda f(u)=0$. Doklady Akademii Nauk, Tome 165 (1965) no. 1, pp. 36-39. http://geodesic.mathdoc.fr/item/DAN_1965_165_1_a9/