1.

図書
図書
1. Asymptotic distribution of eigenvalues of differential operators
by Serge Levendorskiĭ
出版情報: Dordrecht [Netherlands] ; Boston : Kluwer Academic Publishers, c1990
シリーズ名: Mathematics and its applications ; . Soviet series ; v. 53
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2.

図書
図書
2. Two-parameter eigenvalue problems in ordinary differential equations
M. Faierman
出版情報: Harlow, Essex, England : Longman Scientific & Technical , New York : Wiley, 1991
シリーズ名: Pitman research notes in mathematics series ; 205
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