P. Djarot, A. A. Pertiwi, Yulianita, F. Dewi, N. Safira, and V. Y. Firda, “Antioxidant Activity, Toxicity Test and Antimicrobal Test of Streptococcus mutans and Candida albicans Extract Of Ultrasound Assisted Extraction of Java Chili (Piper retrofactum Vahl.) Leaves”, IJHMS, vol. 3, no. 3, pp. 72–86, Aug. 2025.