%0 Journal Article %A Baumgärtel, Hellmut %T On nets of local algebras on $\mathbb {Z}^4$, covariant with respect to the discrete Poincaré group ; causality and scattering theory %J Annales de l'I.H.P. Physique théorique %D 1988 %P 311-323 %V 48 %N 4 %I Gauthier-Villars %U http://www.numdam.org/item/AIHPA_1988__48_4_311_0/ %G en %F AIHPA_1988__48_4_311_0