@article{GDZPPN002223112,
title = {On the Initial-Boundary Value Problem for Harmonic Maps from the 2-Dimensional Minkowski Space.},
journal = {Manuscripta mathematica},
volume = {31},
year = {1980},
pages = {51-58},
zbl = {0447.53038},
url = {http://dml.mathdoc.fr/item/GDZPPN002223112}
}
Chaohao, Gu. On the Initial-Boundary Value Problem for Harmonic Maps from the 2-Dimensional Minkowski Space.. Manuscripta mathematica, Tome 31 (1980) pp. 51-58. http://gdmltest.u-ga.fr/item/GDZPPN002223112/