S.Chandramohan, D.Muthukumaran, N.V Maniprasad, N.Manideep, P.Harikrishna. “Power Meter Reader System Using GSM”. International Journal of Advanced Science and Technology, Vol. 29, no. 10s, May 2020, pp. 6774-9, http://sersc.org/journals/index.php/IJAST/article/view/23561.