Devaraju, T. C., and T. T. Alapieti. 1997. “Occurrence of Cobalt in the Kalyadi (Hassan Dist.) and Ingaldhal (Chitradurga Dist.) Sulphide Deposits of Karnataka”. Journal of Geological Society of India 49 (5):597-98. https://geosocindia.com/index.php/jgsi/article/view/68420.