@article{JRAM_1964__0214_0215_150610,
     author = {M.Z. von Krzywoblocki},
     title = {Integral operators in ordinary differential equations.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {137--140},
     publisher = {mathdoc},
     volume = {0214_0215},
     year = {1964},
     zbl = {0145.10301},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1964__0214_0215_150610/}
}