Alvi, N. V., H. Y. Teruna, and R. Hendra. “Antimalarial Activity of Ugonin J and Ugonin K Isolated from Tunjuk Langit (Helminthostachys Zeylanica)”. Photon: Jurnal Sain Dan Kesehatan, vol. 16, no. 1, Nov. 2025, doi:10.37859/jp.v16i1.9137.