Mathews, R. P., et al. “Characterization of Panandhro Lignite Deposits (Kachchh Basin), Western India: Results from the Bulk Geochemical and Palynofloral Compositions”. Journal of Geological Society of India, vol. 91, no. 3, Mar. 2018, pp. 281-9, doi:10.1007/s12594-018-0851-8.