@article{AM2_1978__17_136736,
     author = {Mourad E.H. Ismail},
     title = {On solving certain differential equations with variable coefficients.},
     journal = {Aequationes mathematicae},
     pages = {148--153},
     year = {1978},
     volume = {17},
     zbl = {0379.34010},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__17_136736/}
}