V. A. Pol
发表
Cr Cees Bayense,
V. A. Pol,
V. Hooff,
1991
.
V. A. Pol,
V. Hooff,
1992
.
P. Jacobs,
P. Kooyman,
J. Martens,
1993
.
V. A. Pol,
V. Hooff,
1993
.