Ekert, Artur; Rarity, John G.; Tapster, Paul R.; Palma, G. Massimo (31 August 1992). "Practical quantum cryptography based on two-photon interferometry". Physical Review Letters. 69 (9). American Physical Society: 1293–1295. Bibcode:1992PhRvL..69.1293E. doi:10.1103/PhysRevLett.69.1293. PMID10047180.
Ekert, Artur; Rarity, John G.; Tapster, Paul R.; Palma, G. Massimo (31 August 1992). "Practical quantum cryptography based on two-photon interferometry". Physical Review Letters. 69 (9). American Physical Society: 1293–1295. Bibcode:1992PhRvL..69.1293E. doi:10.1103/PhysRevLett.69.1293. PMID10047180.
Ekert, Artur; Rarity, John G.; Tapster, Paul R.; Palma, G. Massimo (31 August 1992). "Practical quantum cryptography based on two-photon interferometry". Physical Review Letters. 69 (9). American Physical Society: 1293–1295. Bibcode:1992PhRvL..69.1293E. doi:10.1103/PhysRevLett.69.1293. PMID10047180.