LIPIEC, Iwona and RUSINIAK, Piotr. Stability assessment of sulphur (II) compounds in medicinal water from B-8b Michał intake in Busko-Zdrój. Bulletin of Geography. Physical Geography Series. Online. 1 June 2020. No. 18, pp. 17-23. [Accessed 30 June 2024]. DOI 10.2478/bgeo-2020-0002.