@article{FAA_1967_1_4_a1,
     author = {L. R. Volevich and S. G. Gindikin},
     title = {Pseudo-differential operators and {Cauchy} problem for differential equations with variable coefficients},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {8--25},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_4_a1/}
}