@article{702284,
     title = {On some singular boundary value problems for ordinary differential equations},
     booktitle = {Equadiff 5},
     series = {GDML\_Books},
     publisher = {BSB B.G. Teubner Verlagsgesellschaft},
     address = {Leipzig},
     year = {1982},
     pages = {174-178},
     zbl = {0521.34019},
     url = {http://dml.mathdoc.fr/item/702284}
}

Kiguradze, I. T. On some singular boundary value problems for ordinary differential equations, dans Equadiff 5, GDML_Books,  (1982), pp. 174-178. http://gdmltest.u-ga.fr/item/702284/