@article{DE_1974_10_2_a2,
     author = {N. N. Bogdat'eva},
     title = {The asymptotic behavior of the solutions of a second order equation under a confluence of singular points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {202--209},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_2_a2/}
}