BHATTACHARJEE, Dr. Pijush Kanti. Kaprekar’s Constant 6174 for Four Digits Number Reality to Other Digits Number. International Journal Of Chemistry, Mathematics And Physics(IJCMP), [S. l.], v. 4, n. 5, 2020. Disponível em: https://journal-repository.com/index.php/ijcmp/article/view/3389.. Acesso em: 22 jul. 2024.