Varga P, Lexa J, Uhlík P, Rajnoha M. Characterization of perlites from Jastrabá and Lehôtka pod Brehmi deposits. geol [Internet]. 2015Aug.5 [cited 2024Nov.10];41(1):146. Available from: https://ggae.agh.edu.pl/index.php/geol/article/view/1461