Francesco Pia, and Roberto Ricciu. “Neutron Concentrator, a Hypothetical Small Neutron Star Based on the Emission of Neutrons in Minerals Such As Granite and Other Commonly Available Objects”. Global Journals of Research in Engineering 23, no. E1 (March 24, 2023): 25–30. Accessed May 17, 2024. https://engineeringresearch.org/index.php/GJRE/article/view/101574.