@article{SM_2020_211_5_a1,
     author = {V. S. Gavrilov},
     title = {The {Cauchy} problem for an abstract second order ordinary differential equation},
     journal = {Sbornik. Mathematics},
     pages = {643--688},
     year = {2020},
     volume = {211},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2020_211_5_a1/}
}