Bases of typology and chemical classification of Estonian riversLoigu, Enn; Leisk, ÜlleScience for Water Policy (SWAP). The Implications of the Water Framework Directive : Euroconference2002 / p. 84-85

Chemical indicators and indices for assessment of water quality of Estonian riversLoigu, Enn; Leisk, ÜlleXXII Nordic Hydrological Conference : Roros, Norway 4-7 August 2002. Vol. I2002 / p. 321-328 : ill

Classif[i]cation of chemical status of riversLoigu, Enn; Leisk, Ülle"Environmental Impact and Water Management in a Catchment Area Perspective" : 24-26 September, 2001, Tallinn, Estonia : proceedings of the Symposium dedicated to the 40th Anniversary of Institute of Environmental Engineering at Tallinn Technical University2001 / p. 46-53 : ill

Consequences of catchment processes and climate changes on the ecological status of large shallow temperate lakesNõges, Tiina; Järvet, Arvo; Laugaste, Reet; Loigu, Enn; Leisk, Ülle; Tõnno, Ilmar; Nõges, PeeterAcuatic ecosystems : conservation, restoration and management2005 / p. 88-99

Eesti jõgede veekvaliteedi dünaamika seaduspärasused ja nüüdisseisundLoigu, Enn; Leisk, ÜlleKaasaegse ökoloogia probleemid. Alalhoidlik areng ja looduskeskne elulaad : Eesti VI ökoloogiakonverentsi lühiartiklid, Tartu, 24.-26. aprill 19941994 / p. 146-149

Eesti jõgede veekvaliteedi kujunemine ja pikaajaline dünaamika : väitekiri ... loodusteaduste magistrikraadi taotlemiseksLeisk, Ülle1996 https://www.ester.ee/record=b2680854*est

Emajõe seisundLeisk, ÜlleTartumaa keskkond2001 / lk. 91-92

Environmental assessment and water protection management of Matsalu Bay catchment areaVelner, Harald-Adam; Loigu, Enn; Leisk, ÜlleTallinna Tehnikaülikooli Toimetised1994 / lk. 32-40: ill

Jõgede hüdrokeemiline seireLoigu, Enn; Leisk, ÜlleKeskkonnaseire 19951996 / lk. 57-61: ill

Jõgede seire ja veekvaliteetLoigu, Enn; Hannus, Maila; Leisk, ÜlleEesti keskkonnaseire 1996 = Estonian environmental monitoring1997 / lk. 86-93: ill

Jõgede veekvaliteet ja selle muutused 1992-2001Leisk, Ülle; Loigu, EnnEesti keskkonnaseire 20012002 / lk. 85-87 : ill

Lake PeipsiNõges, Tiina; Leisk, Ülle; Loigu, Enn; Iital, Arvo; Hannus, Maila; Vassiljev, Anatoli; Blinova, Irina2001 https://www.ester.ee/record=b1487291*est

Nutrient budget of Lake Peipsi in 1998Nõges, Peeter; Leisk, Ülle; Loigu, Enn; Reihan, Alvina; Skakalski, Boris; Nõges, TiinaProceedings of the Estonian Academy of Sciences. Biology. Ecology2003 / 4, p. 407-422 : ill https://artiklid.elnet.ee/record=b1014443*est

Ohtlikud ained jõgedesHannus, Maila; Leisk, Ülle; Loigu, EnnOhtlikud ained Eesti keskkonnas2003 / lk. 35-37 : ill

PeipsiHaberman, Juta; Timm, Tarmo; Raukas, Anto; Borissov, Vladimir; Miidel, Avo; Tavast, Elvi; Loigu, Enn; Leisk, Ülle; Iital, Arvo; Pachel, Karin2008 https://www.ester.ee/record=b2341036*est

Peipsi järve valgla reostuskoormus ja jõgede vee kvaliteetLoigu, Enn; Iital, Arvo; Karlova, Svetlana; Leisk, Ülle; Pachel, Karin; Sults, Ülo; Trapido, Marina; Vassiljev, Anatoli; Veldre, IngeborgPeipsi1999 / lk. 66-80: ill

Pharmaceuticals in the Baltic Sea Region - emissions, consumption and environmental risksHenning, Helene Ek; Putna-Nimane, Ieva; Kalinowski, Radoslaw; Perkola, Noora; Bogusz, Aleksandra; Haiba, Egge; Laht, Mailis; Kõrgma, Vallo; Leisk, Ülle2020 https://www.lansstyrelsen.se/4.f2dbbcc175974692d268b9.html

Practices in other countries in the Baltic Sea regionBregendahl, Jeppe; Leisk, Ülle; Haiba, Egge; Schütz, Jan; Stapf, Michael; Kublina, Anete; Szumska, Marlena; Bogusz, Aleksandra; Kalinowski, RadoslawRecommendations for efficient dissemination of environmental information regarding pharmaceuticals : Clear waters from pharmaceuticals (CWPharma) : Activity 4.2 report2020 / p. 20-22 https://www.lansstyrelsen.se/ostergotland/tjanster/publikationer/recommendations-for-efficient-dissemination-of-environmental-information-regarding-pharmaceuticals.html

"Protection of the Coastal Wetland Area - Matsalu Catchment Area" : Estonian-Swedish Joint ProjectFrisen, Rune; Velner, Harald-Adam; Loigu, Enn; Blinova, Irina; Leisk, Ülle; Suurkask, Valdu; Iital, Arvo; Lääne, Ain; Merisaar, Maret; Krutova, Svetlana1995 https://www.ester.ee/record=b1465942*est

Riverine load to the Baltic Sea via EstoniaLoigu, Enn; Leisk, ÜlleTallinna Tehnikaülikooli Toimetised1994 / lk. 14-23: ill

Species composition and diatom indices in relation to environmental parameters in Estonian streamsVilbaste, Sirje; Truu, Jaak; Leisk, Ülle; Iital, ArvoArchiv für hydrobiologie : supplement2007 / 3/4, p. 307-326 : ill https://www.schweizerbart.de/papers/largerivers/detail/17/80030/Species_composition_and_diatom_indices_in_relation_to_environmental_parameters_in_Estonian_streams

Status of Estonian rivers in the Lake Peipsi basinLoigu, Enn; Leisk, Ülle; Olli, K.; Pall, P.; Timm, Henn; Järvekülg, A.; Viik, M.; Porgassaar, M.; Nõges, TiinaSustainable Management of Transboundary Waters in Europe. Convention of the Protection and use of Transboundary Watercourses and International Lakes, Poland, Miedzydroje, 20032003 / p. 483-490

Status of the rivers in the catchment basin of L.Peipsi - the largest transboundary lake in EuropeLoigu, Enn; Leisk, Ülle; Olli, K.; Pall, P.; Timm, Henn; Järvekülg, A.; Viik, M.; Porgassaar, M.; Nõges, TiinaSustainable Management of Transboundary Waters in Europe : Second International Conference, Poland, Miedzyzdroje, 21-24 April, 2002 : lecture and posters2002 / p. 355-363 : ill

The Narva basin - water cooperation in the Estonian-Russian transboundrary commissionLeisk, ÜlleThe water framework directive in the Baltic Sea Region countries - vertical implementation, horizontal integration and transnational cooperation2007 / p. 156-161

The state of rivers and dynamics of trends of organic substances and nutrientsLeisk, Ülle; Loigu, Enn; Hansen, VooteleTallinna Tehnikaülikooli Toimetised1994 / lk. 4-13: ill

The typology of Estonian rivers for assessment of water qualityLeisk, Ülle; Loigu, EnnXXIII Nordic Hydrological Conference ["Fresh Water Resources Management"] : Tallinn, Estonia, 8-12 August 2004 : selected articles. Vol. I2004 / p. 293-299 : ill

Water qualityLoigu, Enn; Leisk, Ülle; Hannus, Maila; Blinova, IrinaPresent and potential production of salmon in Estonian rivers2001 / p. 21-35 : ill

Нагрузка загрязнениями водосбора Псково-Чудского озера и качество воды в рекахLoigu, Enn; Reihan, Alvina; Leisk, Ülle; Iital, Arvo; Pachel, KarinПсково-Чудское озеро2012 / с. 185-208 : ил