@article{BSMF_1997__125_2_313_0,
     author = {Kashiwara, Masaki},
     title = {Algebraic study of systems of partial differential equations},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {313--313},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {125},
     number = {2},
     year = {1997},
     doi = {10.24033/bsmf.2308},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2308/}
}