1. Trace Elements in the Kuznetsk Basin Coals;Arbuzov,2000
2. Trace Element Potential of the Minusinsk Basin Coals;Arbuzov,2003
3. The distribution and origin of minor elements in coal;Bethell;Brit. Coal Util. Res. Ass. Monthly Bull.,1962
4. Coal quality (COALQUAL) database: version 2.0. Open-File Rep.;Bragg,1998
5. Formations of the Northern-Eastern Margin of the European Platform in the Paleozoan;Eliseev,1978