Tandon, S. K., et al. “Magnetic Polarity Stratigraphy of the Upper Siwalik Subgroup, East of Chandigarh, Punjab Sub-Himalaya, India”. Journal of Geological Society of India, vol. 25, no. 1, Jan. 1984, pp. 45-55, https://geosocindia.com/index.php/jgsi/article/view/65299.