@article{ZNSL_1978_78_a16,
     author = {Z. A. Yanson},
     title = {Asymptotics of solutions of a differential equation of second order with two turning points and a complex {parameter.~II}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {220--245},
     publisher = {mathdoc},
     volume = {78},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1978_78_a16/}
}