Sinha, HN. “Silurian Acanthomorphitae Acritarch from the Shiala Formation, Tethys Garhwal Himalaya, India”. Himalayan Journal of Sciences 5, no. 7 (September 23, 2008): 150–151. Accessed December 16, 2025. https://www.nepjol.info/index.php/HJS/article/view/1331.