Journal article (2007) - J Friesen (author), J Friesen (author), J. Friesen (author), J. Friesen (author), HC Winsemius (author), Hessel Winsemius (author), Hessel H.C. Winsemius (author), H. Winsemius (author), H. C. Winsemius (author), C. Hessel Winsemius (author), Hessel C. Winsemius (author), H.C. Winsemius (author), R Beck (author), K Scipal (author), W. Wagner (author), Nick van de van de Giesen (author), Nick van de Van De Giesen (author), Nick van de Giesen (author), Nick van de Van de Giesen (author), N.C. van de Giesen (author), N.C. Van De Giesen (author), N.C. Giesen (author), N.C. Van de Giesen (author), N. C. van de Giesen (author), N. C. Van De Giesen (author), N. C. Giesen (author), N. C. Van de Giesen (author), N. van de Giesen (author), N. Van De Giesen (author), N. Giesen (author), N. Van de Giesen (author), NC van de Giesen (author), NC Van De Giesen (author), NC Giesen (author), NC Van de Giesen (author), Nick C. van de Giesen (author), Nick C. Van De Giesen (author), Nick C. Giesen (author), Nick C. Van de Giesen (author), Nick van de Giesen (author), Nick Van De Giesen (author), Nick Giesen (author), Nick Van de Giesen (author)