@article{AM2_1975__12_136487,
     author = {Theodore Laetsch},
     title = {Nonlinear {Eigenvalue} {Problems} with {Monotonically} {Compact} {Operators.} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {109--109},
     publisher = {mathdoc},
     volume = {12},
     year = {1975},
     zbl = {0317.47043},
     url = {http://geodesic.mathdoc.fr/item/AM2_1975__12_136487/}
}