1. Doctor of Science, Division of Waste Science and Technology, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
2. Doctor of Science, Division of Process Metallurgy, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.
3. Professor and Head, Division of Waste Science and Technology, Luleå Univ. of Technology, SE-971 87 Luleå, Sweden.