Rizal, Achmad, Risanuri Hidayat, and Hanung Adi Nugroho. “Comparison of Multi-Distance Signal Level Difference Hjorth Descriptor and Its Variations for Lung Sound Classifications”. Indonesian Journal of Electrical Engineering and Informatics (IJEEI) 7, no. 2 (May 26, 2019): 345–356. Accessed November 8, 2026. https://section.iaesonline.com/index.php/IJEEI/article/view/771.