[2] F. Bagarello, F. Gargano and S. Triolo Coordinate representation for non-Hermitian position and momentum operators Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Volume 473, Issue 2205 September 2017 Article number 20170434.10.1098/rspa.2017.0434
[3] F. Bagarello, A. Inoue and C. Trapani, Some classes of topological quasi *-algebras, Proc. Amer. Math. Soc., 129 (2001), 2973â2980.10.1090/S0002-9939-01-06019-1
[9] F. Bagarello, C.Trapani and S.Triolo, Representable states on quasilocal quasi *-algebras Journal of Mathematical Physics Volume 52, Issue 15 January 2011 Article number 013510.10.1063/1.3530867
[10] B. Bongiorno, C. Trapani, S.Triolo; Extensions of positive linear functionals on a Topological *-algebra, Rocky Mountain Journal of Mathematics 40(6) (2010), 1745â1777.10.1216/RMJ-2010-40-6-1745