Maxim Raginsky, “Radon–Nikodym derivatives of quantum operations”, Journal of Mathematical Physics, 44, no. 11, 2003, 5003
Jaeseong Heo, Un Cig Ji, “Covariant CP-Instruments and Their Convolution Semigroups”, Complex Anal. Oper. Theory, 15, no. 6, 2021, 98
Arindam Mitra, Máté Farkas, “Compatibility of quantum instruments”, Phys. Rev. A, 105, no. 5, 2022, 052202
Claudio Carmeli, Teiko Heinosaari, Alessandro Toigo, “Covariant quantum instruments”, Journal of Functional Analysis, 257, no. 11, 2009, 3353
Erkka Haapasalo, “Robustness of incompatibility for quantum devices”, J. Phys. A: Math. Theor., 48, no. 25, 2015, 255303
Juha-Pekka Pellonpää, “Quantum instruments: I. Extreme instruments”, J. Phys. A: Math. Theor., 46, no. 2, 2013, 025302
Erkka Haapasalo, Juha-Pekka Pellonpää, “Covariant KSGNS construction and quantum instruments”, Rev. Math. Phys., 29, no. 07, 2017, 1750020
Claudio Carmeli, Teiko Heinonen, Alessandro Toigo, “Why Unsharp Observables?”, Int J Theor Phys, 47, no. 1, 2008, 81
Erkka Haapasalo, Juha-Pekka Pellonpää, “Kolmogorov Decompositions and Extremality Conditions for Positive Covariant Kernels”, Reports on Mathematical Physics, 83, no. 2, 2019, 253
Elena R Loubenets, “Quantum stochastic approach to the description of quantum measurements”, J. Phys. A: Math. Gen., 34, no. 37, 2001, 7639