Petrology and geochemistry of Variscan dykes from the Jáchymov (Joachimsthal) ore district, Czech Republic - Štemprok, Miroslav; Seifert, Thomas; Holub, František V.; Chlupáčová, Marta; Dolejš, David; Novák, Jiří K.; Pivec, Edvín; Lang, Miloš (Journal of Geosciences, 2008)