@article{AIHPA_1985__43_1_29_0,
     author = {Cooper, Alan and Feldman, Joel and Rosen, Lon},
     title = {Legendre transforms and $r$-particle irreducibility in quantum field theory : the formalism for fermions},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {29--106},
     publisher = {Gauthier-Villars},
     volume = {43},
     number = {1},
     year = {1985},
     mrnumber = {813139},
     zbl = {0584.46060},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPA_1985__43_1_29_0/}
}