1
by Hoefnagel, F.J.P.M.
Published 2007
WRR

2
by van Dam-Mieras, M.C.E.
Published 2002
WRR

3
by WRR
Published 1999
WRR

4
by WRR
Published 2002
WRR

5
by Dijstelbloem, H.
Published 2001
WRR

6
by Tjalsma, Heiko
Published 2006
DANS

7
by Gontier, Nathalie
Published 2006
Academia Press