@article{AIHPA_1988__48_4_333_0, author = {\^Ota, Sch\^oichi}, title = {Unbounded representations of a $\ast $-algebra on indefinite metric space}, journal = {Annales de l'I.H.P. Physique th\'eorique}, pages = {333--353}, publisher = {Gauthier-Villars}, volume = {48}, number = {4}, year = {1988}, mrnumber = {969171}, zbl = {0673.46034}, language = {en}, url = {http://archive.numdam.org/item/AIHPA_1988__48_4_333_0/} }