LELYAKOV, O. P.; KARPENKO, A. S.; BABADZHAN, R.-D. O. Dynamics of a Non-Rotating Test Null String in the Gravitational Field of a Closed “Thick” Null String Radially Expanding or Collapsing in the Plane z = 0. Ukrainian Journal of Physics, [S. l.], v. 59, n. 11, p. 1114, 2018. DOI: 10.15407/ujpe59.11.1114. Disponível em: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018555. Acesso em: 1 may. 2024.