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@article{MZM_1992_51_1_a16, author = {S. G. Pyatkov}, title = {Certain properties of eigenfunctions of linear pencils}, journal = {Matemati\v{c}eskie zametki}, pages = {141--148}, publisher = {mathdoc}, volume = {51}, number = {1}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1992_51_1_a16/} }
S. G. Pyatkov. Certain properties of eigenfunctions of linear pencils. Matematičeskie zametki, Tome 51 (1992) no. 1, pp. 141-148. http://geodesic.mathdoc.fr/item/MZM_1992_51_1_a16/