Maheshwari, H. 1967. Studies in the Glossopteris Flora of India- 38. Remarks on Trizygia Speciosa Royle with Reference to the Genus Sphenophyllum Koenig. Journal of Palaeosciences. 16, (1-3) (Dec. 1967), 283–287. DOI:https://doi.org/10.54991/jop.1967.529.