1. Mineralogy and Petrography of the Lead Zinc Copper Sulphide Ores of The Viburnum Trend, Southeast Missouri Sulphide Deposits—Their Origin and Processing;Hagni,1990
2. Mineral Deposit Models;Cox;US Geological Survey, Professional Paper No. 1693,1987
3. Mineral Engineering Japan Visit, Black Ore District of Hokoroku;Mining Engineering,1969
4. Treatment Options of Thalanga Ore;Bulatovic;Report of Investigation, LR049, prepared for Pancontinental Resources,1993