DOEPP, Manfred. The Secret of the Exponential Function in View of Mankind. European Journal of Applied Sciences, [S. l.], v. 11, n. 3, p. 214–217., 2023. DOI: 10.14738/aivp.113.14767. Disponível em: https://scholarpublishing.org/journals/index.php/EJAS/article/view/8551. Acesso em: 30 may. 2026.