Tiwari, M., and R. Azmi. “Late Proterozoic Organic-Walled Microfossils from the Infrakrol of Solan, Himachal Lesser Himalaya: An Additional Age Constraint in the Krol Belt Succession”. Journal of Palaeosciences, vol. 39, no. (1-3), Dec. 1990, pp. 387-94, doi:10.54991/jop.1990.1702.