@article{EMJ_2013_4_4_a4,
     author = {N. D. Kopachevsky and E. V. Syomkina},
     title = {Linear {Volterra} integro-differential second-order equations unresolved with respect to the highest derivative},
     journal = {Eurasian mathematical journal},
     pages = {64--87},
     publisher = {mathdoc},
     volume = {4},
     number = {4},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2013_4_4_a4/}
}