@article{1200694300,
author = {Watanabe, Kinji},
title = {A unique continuation theorem for an elliptic operator of two independent variables with non-smooth double characteristics},
journal = {Osaka J. Math.},
volume = {10},
number = {1},
year = {1973},
pages = { 243-246},
language = {en},
url = {http://dml.mathdoc.fr/item/1200694300}
}
Watanabe, Kinji. A unique continuation theorem for an elliptic operator of two independent variables with non-smooth double characteristics. Osaka J. Math., Tome 10 (1973) no. 1, pp. 243-246. http://gdmltest.u-ga.fr/item/1200694300/