1. Akhiezer, N.I., Glazman, I.M.: Theory of Linear Operators in Hilbert Space. Dover, New York (1993), two volumes bound as one, translated from Russian by M. Nestell, first published by F. Ungar, New York, in 1961 and 1963
2. Beneduci, R.: Joint measurability through Naimark’s dilation theorem. Rep. Math. Phys. 79, 197–214 (2017)
3. Borchers, H.J., Yngvason, J.: Local nets and self-adjoint extensions of quantum field operators. Lett. Math. Phys. 21, 151 (1991)
4. Brunetti, R., Dappiaggi, C., Fredenhagen, K., Yngvason, J. (eds.): Advances in Algebraic Quantum Field Theory. Springer, New York (2015)
5. Buchholz, D., Fredenhagen, K.: A $$C^*$$-algebraic approach to interacting quantum field theories. arXiv:1902.06062 [math-ph]