Chowdhury, T., and M. Nasir Uddin. “OCDMA System Using Two Code Keying Encryption Introducing a SOA Based CMUX And CDEMUX Over a WDM System”. AIUB Journal of Science and Engineering (AJSE), Vol. 18, no. 1, May 2019, pp. 11-17, doi:10.53799/ajse.v18i1.17.