@article{1104114124,
author = {Araki, Huzihiro and Matsui, Taku},
title = {Ground states of the $XY$-model},
journal = {Comm. Math. Phys.},
volume = {97},
number = {3},
year = {1985},
pages = { 213-245},
language = {en},
url = {http://dml.mathdoc.fr/item/1104114124}
}
Araki, Huzihiro; Matsui, Taku. Ground states of the $XY$-model. Comm. Math. Phys., Tome 97 (1985) no. 3, pp. 213-245. http://gdmltest.u-ga.fr/item/1104114124/