D. Vavřík, I. Jandejsek: Simultaneous X-ray and optical inspection of the crack advancing. Proceedings paper, In: 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale. Berlin: Deutscher Verband für Materialforschung und -prüfung e.V., 2010, pp. 145-151. Available from: http://www.gruppofrattura.it/ocs/index.php/esis/ECF18/paper/viewFile/6321/2189, 2010.