Journal article (2008) - SMC van Bohemen (author), A Kamp (author), RH Petrov (author), R. Petrov (author), Roumen Petrov (author), R.H. Petrov (author), R. H. Petrov (author), Roumen H. Petrov (author), Leo Kestens (author), L. Kestens (author), L. A.I. Kestens (author), L.A.I. Kestens (author), Leo A.I. Kestens (author), J. Sietsma (author), Jilt Sietsma (author), J Sietsma (author), Jilt Sietsma (author)