@article{1103840121,
author = {Ezawa, H. and Swieca, J. A.},
title = {Spontaneous breakdown of symmetries and zero-mass states},
journal = {Comm. Math. Phys.},
volume = {4},
number = {1},
year = {1967},
pages = { 330-336},
language = {en},
url = {http://dml.mathdoc.fr/item/1103840121}
}
Ezawa, H.; Swieca, J. A. Spontaneous breakdown of symmetries and zero-mass states. Comm. Math. Phys., Tome 4 (1967) no. 1, pp. 330-336. http://gdmltest.u-ga.fr/item/1103840121/