@article{1195524630,
author = {Yosida, Setuz\^o},
title = {Hukuhara's problem for hyperbolic equations with two independent variables, I. Semi-linear case},
journal = {Proc. Japan Acad.},
volume = {34},
number = {10},
year = {1958},
pages = { 319-324},
language = {en},
url = {http://dml.mathdoc.fr/item/1195524630}
}
Yosida, Setuzô. Hukuhara's problem for hyperbolic equations with two independent variables, I. Semi-linear case. Proc. Japan Acad., Tome 34 (1958) no. 10, pp. 319-324. http://gdmltest.u-ga.fr/item/1195524630/