LELYAKOV, O. P.; KARPENKO, A. S.; BABADZHAN, R.-D. O. Scalar-Field Potential Distribution for a Closed “Thick” Null String Moving in the Plane z = 0. Ukrainian Journal of Physics, [S. l.], v. 59, n. 5, p. 547, 2018. DOI: 10.15407/ujpe59.05.0547. Disponível em: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018481. Acesso em: 5 may. 2024.