@article{FAA_1980_14_4_a23,
     author = {S. Ya. Yakubov and K. S. Mamedov},
     title = {Completeness of the eigen- and associated functions of certain nonregular boundary-value problems for ordinary differential equations},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {93--94},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1980_14_4_a23/}
}