Spectral Properties of Hamiltonian Operators Lecture Notes in Mathematics, nr. 313 Autor K. Jörgens et al. 19 feb 1973 Paperback Preț: 264.19 lei 6-8 săpt.
Eigenwerttheorie gewöhnlicher Differentialgleichungen Hochschultext Autor K. Jörgens et al. mar 1976 Paperback Preț: 467.94 lei 6-8 săpt.