L. . Mas’udah, D. . Wijaya, N. A. . Rahmita, and U. N. . Rahmawati, “High Calcium Boba from Egg Shells to Prevent Stunting and Boost the Immune System”, J. Sains. Kes, vol. 5, no. 2, pp. 218–223, Jan. 2025, doi: 10.30872/jsk.v5i2.p218-223.