Chahine I, Morowah A. From Vortex Mathematics to Smith Numbers: Demystifying Number Structures and Establishing Sieves Using Digital Root. JPRM [Internet]. 2Dec.2019 [cited 11Apr.2025];15(3):2744-57. Available from: https://scitecresearch.com/journals/index.php/jprm/article/view/1803