@article{AIHPA_1981__34_2_173_0,
     author = {Summers, Stephen J.},
     title = {On the phase diagram of a $P (\phi )_2$ quantum field model},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {173--229},
     publisher = {Gauthier-Villars},
     volume = {34},
     number = {2},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1981__34_2_173_0/}
}