@article{AIHPA_1969__11_4_439_0,
     author = {Massidda, V. and Tirapegui, E.},
     title = {Composite propagator and the equivalence theorem in the $Z_3 = 0$ theory},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {439--450},
     publisher = {Gauthier-Villars},
     volume = {11},
     number = {4},
     year = {1969},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1969__11_4_439_0/}
}