@article{UZERU_1997_2_a1,
     author = {M. L. Aghalovian},
     title = {On own values and own functions of one differential operator},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {8--14},
     publisher = {mathdoc},
     number = {2},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_1997_2_a1/}
}