@article{RM_1961_16_2_a3,
     author = {M. S. Agranovich},
     title = {Partial differential equations with constant coefficients},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {23--90},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1961},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1961_16_2_a3/}
}