AMELE TAÏEB. Several results for high dimensional singular fractional systems involving $n^2$ Caputo derivatives. Malaya Journal of Matematik, India, v. 6, n. 03, p. 569–581, 2018. DOI: 10.26637/MJM0603/0017. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/880. Acesso em: 16 jul. 2024.