Christianto, Victor, and Florentin Smarandache. “Assuming Photon As Extended Point Particle in the HyperSoft Topological Space and Other Hypotheses: Issues and Trend Analysis”. HyperSoft Set Methods in Engineering 1 (April 1, 2024): 109–118. Accessed December 22, 2024. https://sciencesforce.com/index.php/hsse/article/view/200.