Chronological constraints on the Palaeozoic geodynamic evolution of the Variscan orogenic root system: Moldanubian Zone of the Bohemian Massif - Schulmann, Karel; Kröner; Wendt; Hegner, Ernst; Konopásek, Jiří; Štípská, Pavla; Lexa, Ondrej (Journal of the Czech Geological Society, 2003)