Single-Dose and Combined-Dose of Nanoparticles from Soursop Leaves (Annona muricata L.) and Sappan Wood (Caesalpinia sappan L.) Induced Apoptosis and Necrosis in HeLA Cells, Astirin, Okid Parama, Prayitno Adi, Artanti Anif Nur, Herawati Elisa, Saad Afiyati Nur ?Ain, and Firstlia Ajeng Dara , Pharmacognosy Journal, September 2021, Volume 13, Issue 5, p.1134-1142, (2021)