Tamarkina, Y. V., Bovan, L. A., Tsyba, N. N., & Kucherenko, V. A. (2008). Development of brown coal porosity under thermolysis with alkalis of different nature. Поверхня, (14), 224-229. вилучено із http://surfacezbir.com.ua/index.php/surface/article/view/274