Ruben Cornelius Siagian, Lulut Alfaris and Goldberd Harmuda Duva Sinaga (2023) “Review for Understanding Dark Matter in The Universe as Negative Energy”, Proceeding International Conference on Religion, Science and Education, 2, pp. 679–685. Available at: https://sunankalijaga.org/prosiding/index.php/icrse/article/view/980 (Accessed: 30 April 2025).