On the uniqueness of the Cauchy problem for partial differential operators with multiple characteristics
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 7 (1980) no. 2, p. 257-285
@article{ASNSP_1980_4_7_2_257_0,
author = {Zeman, Marvin},
title = {On the uniqueness of the Cauchy problem for partial differential operators with multiple characteristics},
journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
publisher = {Scuola normale superiore},
volume = {Ser. 4, 7},
number = {2},
year = {1980},
pages = {257-285},
zbl = {0478.35006},
mrnumber = {581144},
language = {en},
url = {http://www.numdam.org/item/ASNSP_1980_4_7_2_257_0}
}

Zeman, Marvin. On the uniqueness of the Cauchy problem for partial differential operators with multiple characteristics. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 7 (1980) no. 2, pp. 257-285. http://www.numdam.org/item/ASNSP_1980_4_7_2_257_0/

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