Skarns of the Bohemian Massif: origin in closed or open systems? - Pertold, Zdeněk; Pertoldová, Jaroslava; Potužák, Marcel; Pudilová, Marta; Bendl, Jiří; Janoušek, Vojtěch; Zachariáš, Jiří; Spiro; Greenwood (Journal of the Czech Geological Society, 1997)