On spectral flattening techniques in residual-excited linear prediction vocoding. - Chong Kwan Un; Jong Rak Lee (ICASSP, 1982)

A 9600 Bit/s RELP Vocoder With Split-Band Coding. - Chong Kwan Un; Jong Rak Lee (ICC (3), 1984)

Voice Transmission Through the Code Division Multiple Access Local Area Network. - Jong Rak Lee; Chong Kwan Un (ICC, 1986)