@article{DAN_1981_261_5_a8,
     author = {N. N. Frolov},
     title = {Fundamental solutions of infinite-dimensional differential equations with constant coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {1063--1066},
     year = {1981},
     volume = {261},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_261_5_a8/}
}