Changes in nutrient emissions, fluxes and retention in a North-Eastern European lowland drainage basinMourad, Daniel S.J.; Perk, Marcel van der; Piirimäe, KristjanEnvironmental monitoring and assessment2006 / 1, p. 415-448 : ill https://link.springer.com/content/pdf/10.1007/s10661-005-9071-y.pdf

GIS-based quantification of future nutrient loads into Lake Peipsi/Chudskoe using qualitative regional development scenariosMourad, Daniel S.J.; Perk, Marcel van der; Gooch, G.D.; Loigu, Enn; Piirimäe, KristjanProceedings of Diffuse Pollution and Basin Management Conference (DipCon), Dublin, 17-22 Aug., 20032003 / p. 105-111

Quantitative scenarios and modellingMourad, Daniel S.J.; Perk, Marcel van der; Nõges, Tiina; Loigu, Enn; Piirimäe, Kristjan; Skakalski, BorisIntegrated transboundary water management in theory and practice : experiences from the new EU eastern border2006 / p. 101-126 : ill