S. Azhar, M. I. H. Tambunan, M. N. Adlini, and F. A. Sirait, “Characterization morfology of Nepenthes spp. in the lowlands XIII Koto Kampar District, Riau”, Inornatus Biol. Educ. J., vol. 5, no. 2, pp. 71–87, May 2025.