P. A. L. A. H. Hartnagel, “AN APROXIMATIVE THEORY FOR FREQUENCY DEPENDENCE OF THE DIODE”, Mat. Bilt., vol. 23, no. 1, Jan. 1973, Accessed: Jun. 13, 2026. [Online]. Available: https://bilten.smm.org.mk/index.php/bilten/article/view/1349