M. Anitha, G.Jhansi rani, D. kumara, and P. Anuradha, “IMPLEMENTATION OF ARTHEMETIC LOGIC UNIT USING QUATERNARY SIGNED DIGIT NUMBER SYSTEM”, Psychosocial rehabilitation, vol. 24, no. 8, pp. 15363–15375, Oct. 2020, doi: 10.61841/1bh6fe19.