Heidel , Claudia. 2009. The Isotopic Composition of Sulphate Formed by Pyrite Oxidation Experiments – the Influence of Pyrite Grain Size. Записки Горного института 181 (февраль), 7-10. https://pmi.spmi.ru/pmi/article/view/7010.

Heidel , Claudia. 2009. “The Isotopic Composition of Sulphate Formed by Pyrite Oxidation Experiments – the Influence of Pyrite Grain Size”. Journal of Mining Institute 181 (February), 7-10. https://pmi.spmi.ru/pmi/article/view/7010.