A 4-Digit CMOS Quaternary to Analog Converter with Current Switch and Neuron MOS Down Literal Circuit. - Sung Il Han; Young Hee Choi; Heung See Kim (ISMVL, 2001)

A Current-Mode Folding/Interpolating CMOS Analog to Quaternary Converter Using Binary to Quaternary Encoding Block. - Sung Il Han; Seung-Yong Park; Hyeon Kyeong Seong; Heung-Soo Kim (ISMVL, 2002)

A Study on the Design of Flash Analog to Quaternary Converter Using DLC Comparator. - Sung Il Han; Young Hee Choi; Hyeon Kyeong Seong; Heung-Soo Kim (ISMVL, 2003)

Multivariate Analysis of Variance for Fuzzy Data. - Man-Ki Kang; Sung Il Han (Int. J. Fuzzy Log. Intell. Syst., 2004)