Rudin, Nur Ahmad, and Gagas Kuncoro Jati. “The Difference in Cranium Morphological Characteristics of Homo Sapiens, Pithecanthropus Erectus, and Pithecanthropus Soloensis”. Proceeding International Conference on Science and Engineering 4 (February 27, 2021): 95–99. Accessed June 13, 2024. http://sunankalijaga.org/prosiding/index.php/icse/article/view/630.