Kalase MB, Walanda DK, Napitupulu M. Analysis of Vitamin C and Calcium in Jongi Fruits (Dillenia serrata Thunb) Based on Their Maturity Level. J. Akademika Kimia [Internet]. 2019 Aug. 30 [cited 2024 May 7];8(3):147-52. Available from: http://jurnal.fkip.untad.ac.id/index.php/jak/article/view/44