Gerard Drecht

Nitrate leaching in agriculture to upper groundwater in the sandy regions of the Netherlands during the 1992–1995 period

G. Drecht, L. Boumans, D. Fraters, 2005, Environmental monitoring and assessment.

The importance of three centuries of land-use change for the global and regional terrestrial carbon cycle

Bas Eickhout, Rik Leemans, Elke Stehfest, 2009 .