@article{1102650726,
author = {Bergamasco, Adalberto P. and Ribeiro, Hermano de Souza},
title = {Uniqueness in a doubly characteristic Cauchy problem.},
journal = {Pacific J. Math.},
volume = {140},
number = {2},
year = {1989},
pages = { 229-240},
language = {en},
url = {http://dml.mathdoc.fr/item/1102650726}
}
Bergamasco, Adalberto P.; Ribeiro, Hermano de Souza. Uniqueness in a doubly characteristic Cauchy problem.. Pacific J. Math., Tome 140 (1989) no. 2, pp. 229-240. http://gdmltest.u-ga.fr/item/1102650726/