Probierz K, Kwaśny M. Changes of coal rank and petrographic composition of coals from the drillhole BD 57 deposit of "Bzie-Dębina" in the Jastrzębie area (SW part of the Upper Silesian Coal Basin). geol [Internet]. 2014Mar.31 [cited 2024Nov.23];40(1):66. Available from: https://ggae.agh.edu.pl/index.php/geol/article/view/711