Briegel, Hans J.; Dür, Wolfgang; Cirac, Ignacio; Zoller, Peter (1998). "Quantum repeaters: The role of imperfect local operations in quantum communication". Physical Review Letters. 81 (26). APS: 5932–5935. Bibcode:1998PhRvL..81.5932B. doi:10.1103/PhysRevLett.81.5932.
Briegel, Hans J.; Dür, Wolfgang; Cirac, Ignacio; Zoller, Peter (1998). "Quantum repeaters: The role of imperfect local operations in quantum communication". Physical Review Letters. 81 (26). APS: 5932–5935. Bibcode:1998PhRvL..81.5932B. doi:10.1103/PhysRevLett.81.5932.