Gibson, G.; Courtial, J.; Padgett, M. J.; Vasnetsov, M.; Pas'Ko, V.; Barnett, S. M.; Franke-Arnold, S. (2004). «Free-space information transfer using light beams carrying orbital angular momentum». Optics Express. 12 (22): 5448–5456. Bibcode:2004OExpr..12.5448G. PMID19484105. doi:10.1364/OPEX.12.005448
Allen, L.; Padgett, M. J.; Babiker, M. (1999). IV the Orbital Angular Momentum of Light. Col: Progress in Optics. 39. [S.l.: s.n.] pp. 291–372. ISBN9780444501042. doi:10.1016/S0079-6638(08)70391-3
Gibson, G.; Courtial, J.; Padgett, M. J.; Vasnetsov, M.; Pas'Ko, V.; Barnett, S. M.; Franke-Arnold, S. (2004). «Free-space information transfer using light beams carrying orbital angular momentum». Optics Express. 12 (22): 5448–5456. Bibcode:2004OExpr..12.5448G. PMID19484105. doi:10.1364/OPEX.12.005448
Gibson, G.; Courtial, J.; Padgett, M. J.; Vasnetsov, M.; Pas'Ko, V.; Barnett, S. M.; Franke-Arnold, S. (2004). «Free-space information transfer using light beams carrying orbital angular momentum». Optics Express. 12 (22): 5448–5456. Bibcode:2004OExpr..12.5448G. PMID19484105. doi:10.1364/OPEX.12.005448