Mayefis D, Ghiffari HD, Manurung RSY, Gusmali DM. Formulation and antioxidant activity test of sea kale cream (Ipomoea pescaprae) with DPPH (1.1-diphenyl-2-picrylhydrazyl) method. midwifery [Internet]. 2023 Oct. 10 [cited 2026 Jun. 15];11(4):667-75. Available from: https://midwifery.iocspublisher.org/index.php/midwifery/article/view/1314