Van As, Henk, Forest Ecology and Forest Management Group,
Wageningen University,
P.O. Box 47,
6700 AA Wageningen,
The Netherlands Vergeldt, Frank J., Laboratory of Biophysics and Wageningen NMR Centre,
Wageningen University,
Dreijenlaan 3,
6703 HA Wageningen,
The Netherlands Vieira, Ricardo
