1. CanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa, Ontario K1A 1M1, Canada
2. Eurotechnica GmbH, An den Stücken 55, 22941 Bargteheide, Germany
3. Institute of Petroleum Engineering, Clausthal University of Technology, Agricolastraße 10, 38678 Clausthal-Zellerfeld, Germany