1. LimCo International GmbH, Technologiezentrum Konstanz, Blarerstrβe 56, 78462 Konstanz, Germany
2. School of Earth and Environmental Science, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth PO1 3QL, UK
3. School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, UK