B. N. . Biswal, “FORMAL CHARGE — A NOVEL METHOD FOR TEACHING THEORETICAL INORGANIC CHEMISTRY”, SS, vol. 48, no. 1-2, pp. p.69–72, Mar. 2010, Accessed: Aug. 19, 2025. [Online]. Available: http://ejournals.ncert.gov.in/index.php/SS/article/view/635