@article{AIHPA_1998__69_2_241_0,
     author = {Antoine, J.-P. and Bagarello, F. and Trapani, C.},
     title = {Extension of representations in quasi $^\ast $-algebras},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {241--264},
     publisher = {Gauthier-Villars},
     volume = {69},
     number = {2},
     year = {1998},
     mrnumber = {1638895},
     zbl = {0922.46048},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1998__69_2_241_0/}
}