@article{ZNSL_2009_373_a5,
     author = {V. P. Gerdt},
     title = {Algebraically simple involutive differential systems and {Cauchy} problem},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {94--103},
     publisher = {mathdoc},
     volume = {373},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_373_a5/}
}