B. N. PRASAD; T. N. PANDEY, A. K. JAISWAL. Three Dimensional Landsberg Space with Constant Unified Main Scalar. Journal of International Academy of Physical Sciences, [S. l.], v. 8, n. 1-4, p. 77–84, 2004. Disponível em: https://www.iaps.org.in/journal/index.php/journaliaps/article/view/785. Acesso em: 18 may. 2024.