Aitsam, A., Velner, H.-A. & Paal, L. 1965. Engineer Calculations of the Admissible Load of Pollution in River. TTU print, Tallinn.
Arnold, J. G., Allen, P. M. & Bernhardt, G. T. 1993. A comprehensive surface–groundwater flow model. J. Hydrol., 142, 47–69.
doi:10.1016/0022-1694(93)90004-S
Brown, L. C. & Barnwell, T. O. 1987. The Enhanced Stream Water Quality Models QUAL2E and QUAL2E-UNCAS: Documentation and Users Manual. U.S. Environmental Protection Agency, Athens.
Chapra, S. C. & Pelletier, G. J. 2003. QUAL2K: A Modeling Framework for Simulating River and Stream Water Quality: Documentation and Users Manual. Civil and Environmental Engineering Dept., Tufts University, Medford.
Iital, A., Loigu, E. & Vagstad, N. 2003. Nutrient losses and N & P balances in small agricultural watersheds in Estonia. Nord. Hydrol., 34, 531–542.
Iital, A., Stålnacke, P., Deelstra, J., Loigu, E. & Pihlak, M. 2005. Effects of large-scale changes in emissions on nutrient concentrations in Estonian rivers in the Lake Peipsi drainage basin. J. Hydrol., 304(1–4), 261–273.
doi:10.1016/j.jhydrol.2004.07.034
Krysanova, V. & Becker, A. 1999. Integrated modelling of hydrological processes and nutrient dynamics at the river basin scale. Hydrobiologia, 410, 131–138.
doi:10.1023/A:1003728419934
Krysanova, V., Meiner, A., Roosaare, J. & Vasilyev, A. 1989. Simulation modelling of the coastal waters pollution from agricultural watershed. Ecol. Model., 49, 7–29.
doi:10.1016/0304-3800(89)90041-0
Krysanova, V., Müller-Wohlfeil, D. I. & Becker, A. 1998. Development and test of a spatially distributed hydrological/water quality model for mesoscale watersheds. Ecol. Model., 106(1–2), 261–289.
doi:10.1016/S0304-3800(97)00204-4
Krysanova, V., Wechsung, F., Meiner, A. & Vasilyev, A. 1999. Land use change in Europe and implications for agriculture and water resources. In Harmonisation with the Western Economics: Estonian Developments and Related Conceptual and Methodological Frameworks (Ennuste, Ü. & Wilder, L., eds), pp. 361–384. Estonian Institute of Economics at Tallinn Technical University, Tallinn.
Leisk, Ü. 2006. Monitoring of Estonian rivers. In Proceedings of the 21th Meeting of the ICP Waters Programme Task Force, Tallinn, October 17–19, 2005, 6–7.
Lindström, H., Gunnarson, J., Wennerblom, T. & Kvarnäs, H. 2000. Implementing sustainable water regimes. In Sustainable Water Management in the Baltic Sea Basin. Book III. River Basin Management (Lundin, L.-C., ed.), pp. 221–229. Ditt Tryckeri i, Uppsala.
Mourad, D., van der Perk, M., Nõges, T., Stålnacke, P., Pihlak, M., Loigu, E., Piirimäe, K. & Skakalsky, B. 2006. Quantitative scenarios and modelling. In Integrated Transboundary Water Management in Theory and Practice: Experience from the New EU Eastern Borders (Gooch, G. D. & Stålnacke, P., eds), pp. 101–126. IWA Publishing, London.
Nõges, P., Leisk, Ü., Loigu, E., Reihan, A., Skakalski, B. & Nõges, T. 2003. Nutrient budget of Lake Peipsi in 1998. Proc. Estonian Acad. Sci. Biol. Ecol., 52, 407–422.
Paal, L. 1976. Water Quality Calculation Methods in Streams. TTU print, Tallinn.
Piirimäe, K. 2007. Long-term Changes of Nutrient Fluxes in the Drainage Basin of the Gulf of Finland – Application of the PolFlow Model. TTU print, Tallinn.
Posch, M. & Rekolainen, S. 1993. Erosivity factor in the Universal Soil Loss Equation estimated from Finnish rainfall data. Agric. Sci. Finland, 2, 271–279.
Tattari, S., Bärlund, I., Rekolainen, S., Posch, M., Siimes, K., Tuhkanen, H.-R. & Yli-Halla, M. 2001. Modelling sediment yield and phosphorus transport in Finnish clayey soils. Trans. ASAE, 44, 297–307.
Türk, K., Leetsar, J., Pachel, H., Truu, K. & Sild, H. 1985. Eesti NSV jõgede arvutuslik veekvaliteet. Eesti Maaparandusprojekt, Tallinn.
Uuemaa, E., Roosaare, J. & Mander, Ü. 2005. Scale dependence of landscape metrics and their indicatory value for nutrient and organic matter losses from catchments. Ecol. Indic., 5, 350–369.
doi:10.1016/j.ecolind.2005.03.009
Uuemaa, E., Roosaare, J. & Mander, Ü. 2007. Landscape metrics as indicators of river water quality at catchment scale. Nord. Hydrol., 38(2), 125–138.
doi:10.2166/nh.2007.002
Vassiljev, A. 2006. Comparison of two one-dimensional nitrogen leaching models at the watershed scale. Envir. Eng. Sci., 23(1), 225–229.
Vassiljev, A. & Stålnacke, P. 2005. Statistical modelling of riverine nutrient sources and retention in the Lake Peipsi drainage basin. Water Sci. Technol., 51(3–4), 309–317.
Vassiljev, A., Blinova, I. & Ennet, P. 2008. Source apportionment of nutrients in Estonian rivers. Desalination, 226, 222–230.
doi:10.1016/j.desal.2007.02.108
Velner, H., Aitsam, A., Loopmann, A. & Pachel, H. 1967. Põhja-Eesti veekogude kaitse reostuse vastu. Põhja-Eesti veemajanduslik skeem. Parts I, II, III. Eesti Projekt/TPI Sanitaartehnika TU laboratoorium, Tallinn.
Wade, A. J., Neal, C., Whitehead, P. G. & Flynn, N. J. 2005. Modelling nitrogen fluxes from the land to the coastal zone in European systems: a perspective from the INCA project. J. Hydrol., 304, 413–429.
doi:10.1016/j.jhydrol.2004.07.041
Wulff, F., Bonsdorff, E., Gren, I.-M., Johansson, S. & Stigebrandt, A. 2003. Giving advice on cost effective measures for a cleaner Baltic Sea: a challenge to science. Ambio, 30(4–5), 245–259.