Chambega, D.J. “Derivation and Analysis of Maximum and Conditional Work of an Electromagnet in Relays With Small Gaps and Constant Armature Load”. Tanzania Journal of Engineering and Technology 27, no. 1 (June 30, 2004): 59-63. Accessed November 22, 2024. https://tjet.udsm.ac.tz/index.php/tjet/article/view/344.