@article{DAN_1970_192_5_a4,
     author = {I. T. Kiguradze},
     title = {A certain singular boundary value problem for an ordinary differential equation of order~$n$},
     journal = {Doklady Akademii Nauk},
     pages = {973--975},
     publisher = {mathdoc},
     volume = {192},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_192_5_a4/}
}