The nederlands bibliographic style was implemented by Werenfried Spit (spit@vm.ci.uv.es).
The idea for citeyear came from Renate Schmidt
(Renate.Schmidt@mpi-sb.mpg.de).
The solution to the mysterious enddocument problem came
from Berwin A. Turlach (berwin@core.ucl.ac.be) as did the identification
of a subtle problem with sorting entries in the reference list.