@article{DE_1990_26_1_a12,
     author = {M. T. Pikula},
     title = {Regularized traces of a differential operator of {Sturm--Liouville} type with retarded argument},
     journal = {Differencialʹnye uravneni\^a},
     pages = {103--109},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_1_a12/}
}