1. Fixed points of quantum operations;Arias;J. Math. Phys.,2002
2. Operational Quantum Physics;Busch,1995
3. New Trends in Quantum Structures;Dvurečenskij,2000
4. Sequential product of quantum effects;Gheondea;Proc. Amer. Math. Soc.,2004
5. A structure for quantum measurements;Gudder;Proc. Amer. Math. Soc.,2005