1. Relationship between ash and germanium content of coal and its genetic significance;Adamankin;Doklady Akademii Nauk SSSR,1970
2. Germanium content of different genetic types of coal in some fields of Transbaikal;Adamankin;Doklady Akademii Nauk SSSR,1974
3. Two types of concentration of germanium in coal;Adamankin;Doklady Akademii Nauk SSSR,1975
4. Progress review no. 55: the distribution and origin of minor elements in coal;Bethell;Journal of the Institute of Fuel,1963
5. Boron in illite as an indicator of paleosalinity of Illinois coals;Bohor;Journal of Sedimentary Petrology,1973