HARJUNOWIBOWO, D., R. W. . HASTUTI, K. A. . RATOPO, A. . JAMALUDDIN, and S. ANNUR. “SIMPLE BLOCKING OSCILLATOR PERFORMANCE ANALYSIS FOR BATTERY VOLTAGE ENHANCEMENT”. Journal of Mobile Multimedia, vol. 11, no. 3-4, Nov. 2015, pp. 321-9, https://journals.riverpublishers.com/index.php/JMM/article/view/4519.