@article{INTD_1987_30_a1,
     author = {I. T. Kiguradze and B. L. Shekhter},
     title = {Singular boundary value problems for second-order ordinary differential equations},
     journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Noveishie Dostizheniya},
     pages = {105--201},
     publisher = {mathdoc},
     volume = {30},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTD_1987_30_a1/}
}