Measuring our universe from galaxy redshift surveys. Lahav, Ofer, Suto, Yasushi (2004) Living Reviews in Relativity [electronic only]
Metric tensors for homogeneous, isotropic, 5-dimensional pseudo Riemannian models. Anchordoqui, Luis A., Birman, Graciela S. (1998) Revista Colombiana de Matemáticas
Mirror symmetry and conformal flatness in general relativity. Gravel, P., Gauthier, C. (2004) International Journal of Mathematics and Mathematical Sciences