@article{FPM_2006_12_6_a8,
     author = {A. Yu. Popov},
     title = {On the number of real eigenvalues of a~certain boundary-value problem for a~second-order equation with fractional derivative},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {137--155},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2006_12_6_a8/}
}