DERCO, JÁN, e ZOLTÁN NÉMETH. “Obtaining of High Quality Talc from Talcose Rocks: A Case Study from the Sinec and Kokava Deposits (Slovakia)”. Boletim Paranaense de Geociências 50 (junho 30, 2002). Acessado março 15, 2025. https://revistas.ufpr.br/geociencias/article/view/4164.