Papers The Charge Quantum Numbers of Gauge Invariant Quasi-free Endomorphisms Carsten Binnenhei April 22, 1999 charge structure, two-dimensional models open access link doi:10.1142/S0129055X00000484 Charged Quantum Fields Associated with Endomorphisms of CAR and CCR Algebras Carsten Binnenhei September 07, 1998 Superselection Theory open access link