1. Une nouvelle limite non-relativiste du group de Poincaré;Lévy-Leblond;Ann. Inst. H. Poincaré,1965
2. On an analogue of the Galileo group;Sen Gupta;Il Nuovo Cimento,1966
3. Possible kinematics;Bacry;J. Math. Phys.,1968
4. Relativity without light: A new proof of Ignatowski’s theorem;Anker;J. Geom. Phys.,2020
5. J.-M. Souriau, Mécanique statistique et thermodynamique, chap.IV sect. 18 : “États statistiques” of the never published 2nd Edition of his book [75]. p.324 # (18.87) written around 1974 [communication of F. Ziegler].