On the characterization of physical states in gauge theories O. Steinmann — 1989 Annales de l'I.H.P. Physique théorique
Axiomatic approach to perturbative quantum field theory O. Steinmann — 1995 Annales de l'I.H.P. Physique théorique
Axiomatic field theory and quantum electrodynamics : the massive case O. Steinmann — 1975 Annales de l'I.H.P. Physique théorique