KARACAN, M. K.; YOON, D. W.; KIZILTUG, S. Helicoidal Surfaces in the three dimensional simply isotropic space I₃¹. Tamkang Journal of Mathematics, [S. l.], v. 48, n. 2, p. 123-134, 2017. DOI: 10.5556/j.tkjm.48.2017.2200. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/2200. Acesso em: 19 sep. 2021.