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@article{DAN_1969_186_4_a11, author = {I. A. Shishmarev}, title = {The eigenfunctions of the polyharmonic operator}, journal = {Doklady Akademii Nauk}, pages = {781--782}, publisher = {mathdoc}, volume = {186}, number = {4}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_186_4_a11/} }
I. A. Shishmarev. The eigenfunctions of the polyharmonic operator. Doklady Akademii Nauk, Tome 186 (1969) no. 4, pp. 781-782. http://geodesic.mathdoc.fr/item/DAN_1969_186_4_a11/