1. The importance of tonstein from the Coal Seam 610 as the correlation horizon in the southwestern part of the Upper Silesian Coal Basin;Adamczyk;Geol. Q.,1997
2. Decay of date palm wood by white-rot and brown rot fungi;Adaskaveg;Can. J. Bot.,1991
3. Volcanogenic tonsteins from Tertiary coal measures, East Kalimantan, Indonesia;Addison;Int. J. Coal Geol.,1983
4. Lithogenetic indicators of tonsteins;Admakin;Lithol. Miner. Resour.,2001
5. Standard Terminology of Coal and Coke, D121-15;American Standard Testing Material,2015