@article{DE_1974_10_10_a20,
     author = {A. A. Kuleshov},
     title = {The fundamental solution of quadratic systems of pseudodifferential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1905--1907},
     publisher = {mathdoc},
     volume = {10},
     number = {10},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_10_a20/}
}