@article{DE_2006_42_2_a5,
     author = {A. V. Makhnei and R. M. Tacyj},
     title = {Eigenfunction expansions for a singular quasidifferential operator with simple eigenvalues},
     journal = {Differencialʹnye uravneni\^a},
     pages = {179--187},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_2_a5/}
}