M. P. Sari, D. R. Gunarti, and M. Sadikin, “Protease from Courgette (Luffa Acutangula L (Roxb)): Isolation, Purification, and Some Characteristics”, JSDH, vol. 5, no. 2, pp. 64–71, Nov. 2019, doi: 10.29244/jsdh.5.2.64-71.