Schellekens, J., Scatena, F. N., Bruijnzeel, L. A., van Dijk, A. I. J. M., Groen, M. M. A. and van Hogezand, R. J. P. (2004), Stormflow generation in a small rainforest catchment in the Luquillo Experimental Forest, Puerto Rico. Hydrological Processes18: 505-530. doi:10.1002/hyp.1335.
Van de Griend, A. A., M. Owe, M. Groen, and M. P. Stoll (1991), Measurement and spatial variation of thermal infrared surface emissivity in a savanna environment, Water Resources Research, 27(3), 371-379, doi:10.1029/90WR02616.
Appelo, A.J., Groen, M., Heidweiller, V.M.L., Smit, P.M., 1983. Hydrochemistry of springs in an Alpine carbonate/serpentines terrain, Int. Symp. on water rock interaction, Misasa, Japan.
Dirks, F., Geirnaert, W., Groen, M., 1983. Electromagnetic profiling in the investigation of small scale ground water flow systems. MIIGS symposium, Noordwijkerhout, The Netherlands.
Geirneart, W., Groen, M., Sommen, J. v.d., Leusink, A., 1983. Isotope studies as a final stage in groundwater investigations on the African shield. Int. Symp. on challenges in African hydrology and water resources, Harare, Zimbabwe.
