1. Faculty of Mining and Geology, VŠB-Technical University of Ostrava, 17 listopadu 15, 708 00 Ostrava, Czech Republic
2. Institute of Geological Sciences at Polish Academy of Sciences, Twarda st. 51/55, 00-818 Warsaw, Poland
3. Anadarko Petroleum Corporation, 1201 Lake Robbins Drive, The Woodlands, TX 77380, USA