R. K. Dubey,  On Bianchi Type Cosmological Models in Lyra’s Geometry.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 92(8). 1177 - 1185
    [viewed 26 May 2022]. Available from: https://publications.waset.org/pdf/10003787.