@article{GDZPPN002066580,
title = {A uniqueness theorem for Zn-periodic variational problems.},
journal = {Commentarii mathematici Helvetici},
volume = {62},
year = {1987},
pages = {511-531},
zbl = {0634.49018},
url = {http://dml.mathdoc.fr/item/GDZPPN002066580}
}
Bangert, V. A uniqueness theorem for Zn-periodic variational problems.. Commentarii mathematici Helvetici, Tome 62 (1987) pp. 511-531. http://gdmltest.u-ga.fr/item/GDZPPN002066580/