@misc{cryptoeprint:2004:229,
    author = {Xin L¨¹  and Zhi Ma and Dengguo Feng},
    title = {Secure Direct Communication Using Quantum Calderbank-Shor-Steane Codes},
    howpublished = {Cryptology ePrint Archive, Report 2004/229},
    year = {2004},
    url = {http://eprint.iacr.org/2004/229},
}