@article{PIM_1978_N_S_24_38_a24,
     author = {W. R. Utz},
     title = {"Properties {Of} {Solutions} {Of} {The} {Differential} {Equation} x x""-k x' {\texttwosuperior}+f(x)=0"},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {189 },
     publisher = {mathdoc},
     volume = {_N_S_24},
     number = {38},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/PIM_1978_N_S_24_38_a24/}
}