Journal article (2007) - R.E. Plessix (author), RE Plessix (author), M Darnet (author), W. A. Mulder (author), W. Mulder (author), Wim Mulder (author), Wim A. Mulder (author), W.A. Mulder (author), Wim A Mulder (author), WA Mulder (author)