YILMAZ, S.; UNLUTURK, Y. On spherical indicatrices of curves in Galilean 4-space G₄. Journal of the Indonesian Mathematical Society, [S. l.], v. 25, n. 2, p. 154–170, 2019. DOI: 10.22342/jims.25.2.473.154-170. Disponível em: https://jims-a.org/index.php/jimsa/article/view/473. Acesso em: 4 may. 2024.