1. On the preparation of optimum blends of coking coal to achieve maximum M-40 hardness values of coke;Simonis;Gluckauf-Forschungshefte,1966
2. Selection of coals and blend preparation for optimum coke quality;Gibson,1977
3. U.K. views on blend composition and preparation;Gregory,1977
4. Calculation of coking properties on the basis of petrographic characteristics of coals;Ammosov;Coke and Chemistry,1957
5. Recent developments in coal petrography;Schapiro,1961