L. Hartanto Nugroho, Utaminingsih, Y. Sri Hartini, J. Julianus, and R. Susandarini, “Phytochemical profiling and identification of chemical markers in four Piper species using liquid chromatography-high resolution mass spectrometry for authentication of herbal products”, Agr. Nat. Resour., vol. 59, no. 5, p. 590509, Mar. 2026.