%0 Journal Article %A A. A. Abramov %A V. V. Ditkin %A N. B. Konyukhova %A B. S. Pariiskii %A V. I. Ul'yanova %T The calculation of eigenvalues and eigenfunctions of ordinary differential equations with singularities %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1980 %P 1155-1173 %V 20 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1980_20_5_a6/ %G ru %F ZVMMF_1980_20_5_a6