@article{VMUMM_2013_4_a7,
     author = {S. I. Mitrokhin},
     title = {Spectral properties of a {Sturm--Liouville} type differential operator with a retarding argument},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {38--42},
     publisher = {mathdoc},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2013_4_a7/}
}