@article{DAN_1962_144_3_a10,
     author = {V. N. Funtakov},
     title = {An eigenfunction expansion of non-selfadjoint singular differential equations of second order},
     journal = {Doklady Akademii Nauk},
     pages = {505--508},
     publisher = {mathdoc},
     volume = {144},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_144_3_a10/}
}