@article{DAN_1963_153_5_a3,
     author = {F. G. Maksudov},
     title = {Expansion in eigenfunctions of non-selfadjoint, singular second-order differential operators depending on a parameter},
     journal = {Doklady Akademii Nauk},
     pages = {1001--1004},
     year = {1963},
     volume = {153},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_153_5_a3/}
}