@article{ZNSL_2004_309_a10,
     author = {M. N. Yakovlev},
     title = {Solvability of singular boundary-value problems for ordinary differential equations of order~$2m$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {174--188},
     publisher = {mathdoc},
     volume = {309},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2004_309_a10/}
}