Simple quantum error-correcting codes.
Phys Rev A 54:6 (1996) 4741-4751
Active stabilisation, quantum computation and quantum state synthesis
(1996)
Multiple-particle interference and quantum error correction
Proceedings of the Royal Society A The Royal Society 452:1954 (1996) 2551-2577
Error Correcting Codes in Quantum Theory.
Phys Rev Lett 77:5 (1996) 793-797