Hidayat, T., P. Mahasena, B. Dermawan, D. Herdiwijaya, H. Setyanto, M. Irfan, B. Suhardiman, and A. Santoso. “Developing Information System on Lunar Crescent Observations”. Journal of Mathematical and Fundamental Sciences 42, no. 1 (July 21, 2013): 67-80. Accessed November 2, 2025. https://journals.itb.ac.id/index.php/jmfs/article/view/58.