https://www.efecon.tuiasi.ro/research-article/effects-of-elevated-temperatures-on-the-microstructural-physico-mechanical-and-elastic-properties-of-barakar-sandstone-a-study-from-one-of-the-world%e2%80%99s-largest-underground-coalmine-fire-regio/ EFECON Sun, 22 May 2022 17:37:13 +0000 hourly 1 https://wordpress.org/?v=6.1.1