@article{1103908148,
author = {Harrell, Evans M.},
title = {Double wells},
journal = {Comm. Math. Phys.},
volume = {71},
number = {1},
year = {1980},
pages = { 239-261},
language = {en},
url = {http://dml.mathdoc.fr/item/1103908148}
}
Harrell, Evans M. Double wells. Comm. Math. Phys., Tome 71 (1980) no. 1, pp. 239-261. http://gdmltest.u-ga.fr/item/1103908148/