1. The effect of gamma irradiation on the extractable matter in bituminous coal;Henely;Fuel,1961
2. The structure and properties of coals;Kasatochkin,1995
3. Influence of irradiation on the solubility of Nazarovo brown coal;Larina;Khim. Tv. Topliva,1975
4. Studies on the gamma irradiation of coals;Roy;Fuel,1963