@article{BSMF_1990__118_2_147_0,
author = {Xu, Chao-Jiang},
title = {Subelliptic variational problems},
journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
volume = {118},
year = {1990},
pages = {147-169},
doi = {10.24033/bsmf.2141},
mrnumber = {92b:49008},
zbl = {0717.49004},
language = {en},
url = {http://dml.mathdoc.fr/item/BSMF_1990__118_2_147_0}
}
Xu, Chao-Jiang. Subelliptic variational problems. Bulletin de la Société Mathématique de France, Tome 118 (1990) pp. 147-169. doi : 10.24033/bsmf.2141. http://gdmltest.u-ga.fr/item/BSMF_1990__118_2_147_0/
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