Japaridze, G.; Khelashvili, A.; Turashvili, K. (2020). "Critical comments on the quantization of the angular momentum: II. Analysis based on the requirement that the eigenfunction of the third component of the operator of the angular momentum must be a single valued periodic function". arXiv:2004.10673 [physics.gen-ph].
Buchdahl, H. A. (1962). "Remark Concerning the Eigenvalues of Orbital Angular Momentum". American Journal of Physics. 30 (11): 829–831. Bibcode:1962AmJPh..30..829B. doi:10.1119/1.1941817.
Buchdahl, H. A. (1962). "Remark Concerning the Eigenvalues of Orbital Angular Momentum". American Journal of Physics. 30 (11): 829–831. Bibcode:1962AmJPh..30..829B. doi:10.1119/1.1941817.