Geoochemistry of peridotites, pyroxenites, and eclogites in the Gfohl nappe: constraints on Variscan evolution of lithosphere and asthenosphere in the Bohemian Massif - Medaris Jr.,L.G.; Beard,B.L.; Johnson,C.M.; Valley,J.W.; Spicuzza,M.J.; Jelinek,E.; Misar,Z. (Journal of the Czech Geological Society, 1994)