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@article{MZ_1973__133_171960, author = {Johann Walter}, title = {Regular {Eigenvalue} {Problems} with {Eigenvalue} {Parameter} in the {Boundary} {Condition.}}, journal = {Mathematische Zeitschrift}, pages = {301--312}, publisher = {mathdoc}, volume = {133}, year = {1973}, zbl = {0246.47058}, url = {http://geodesic.mathdoc.fr/item/MZ_1973__133_171960/} }
Johann Walter. Regular Eigenvalue Problems with Eigenvalue Parameter in the Boundary Condition.. Mathematische Zeitschrift, Tome 133 (1973), pp. 301-312. http://geodesic.mathdoc.fr/item/MZ_1973__133_171960/