1. Aggarwal CC, Hinneburg A, Keim DA (2001) On the surprising behavior of distance metrics in high dimensional spaces. Proceedings of the 8th International Conference on Database Theory (ICDT): Lecture Notes in Computer Science 1973:420-434
2. Cover TM, Hart PE (1967) Nearest neighbor pattern classification. IEEE Trans. Inform. Theory IT-13:21-7
3. Handbook of Water Resources of the USSR. (1936) V.3. Catchment of the Upper Volga and Oka. Part 2.
4. Hering D, Buffagni A, Moog O, Sandin L, Sommerhauser M, Stubauer I, Feld C, Johnson R, Pinto P, Skoulikidis N, Verdonschot P, Zahradkova S (2003) The development of a system to assess the ecological quality of streams based on macroinvertebrates - design of the sampling programme within the AQEM project. International Review of Hydrobiology 88: 345-361.
5. Kelly M.G., Bennion H., Cox E.J., Goldsmith B., Jamieson J., Juggins S., Mann D.G., Telford R.J. (2005): Common freshwater diatoms of Britain and Ireland: an interactive key. (http://craticula.ncl.ac.uk/EADiatomKey/html, 22.05.2008), Environment Agency, Bristol.
6. Kingston J. (1985). Diatom analisis. Paleoecological investigation of recent lake acidification (Pirla). Interim version, Indiana University. In: Schiedele S. 1987. Indikatorwert benthischer Diatomeen in der Isar zw. Mittenwald u. Landshut, Diplomarbeit a. d. Universität München 7. Krammer K. & Lange-Bertalot H. (1986-2004). Bacillariophyceae. 1-5. Süsswasserflora von Mitteleuropa. Gustav Fischer Verlag, Stuttgart, New York.
7. Krammer K. & Lange-Bertalot H. (1986-2004). Bacillariophyceae. 1-5. Süsswasserflora von Mitteleuropa. Gustav Fischer Verlag, Stuttgart, New York.
8. Kurlov MG (1928) Classification of mineral Waters of Siberia. Tomsk, U.S.S.R.; cit. in: Zaporozec A (1972) Graphical Interpretation of Water-Quality Data. Ground Water Vol. 10, No.2
9. MOOG O (Ed.) (2002): Fauna Aquatica Austriaca, Lieferung 2002.- Wasserwirtschaftskataster, Bundesministerium für Land- und Forstwirtschaft, Umwelt und Wasserwirtschaft, Wien (Online: https://www.bmlfuw.gv.at/wasser/wasser-oesterreich/plan_gewaesser_ngp/umsetzung_wasserrahmenrichtlinie/FAA.html).
10. Prygiel J. & Coste M. (eds.) (2000). Tax’IBD - Logiciel de reconnaissance des diatomées retenues pour le calcul de l’ Indice Biologique Diatomées (Frensh and English Version on CD). Cemagref
11. Puzachenko YG, Zheltukhin AS, Kozlov DN, Korablyov NP, Fedyaeva MV, Puzachenko MY, Siunova EV (2007) Central Forest State Biosphere Reserve - 75 years, pp. 80, Delovoi Mir.
12. REFCOND (2003) Guidance on establishing reference conditions and ecological status class boundaries for inland surface waters, 86 p., Final Report of the Working Group 2.3 (EU Common Implementation Strategy (CIS) for the Water Framework Directive).
13. Schletterer M (2009) Benthic invertebrates and reference conditions in East European running waters: case study in the headwaters of Volga River (Tver region, Russia) and adjacent water bodies. 302 pp., dissertation (PhD thesis), Faculty of Biology of the University of Innsbruck.
14. Schletterer M, Kuzovlev VV, Zhenikov YN (2010) Macrozoobentos and bottom diatoms of the Tudovka River (Never Oblast, Russia. In: Dynamics of phenomena and processes of the natural complex of the reserve: Letopis prirody 50: 412-425.
15. Schletterer M, Füreder L, Kuzovlev VV, Zhenikov YN, Grigorieva IL (2014) Lowland river reference condition: spatial and temporal patterns of the zoobenthos community in the Volga headwaters (2006-2010). Hydrobiologia 729:175-189
16. Schletterer M, Füreder L, Kuzovlev VV, Zhenikov KY, Zhenikov YN (2016) REFCOND_VOLGA: a monitoring programme for water quality in the headwaters of the Volga River (Tver region, Russia). Revista Eletrônica de Gestão e Tecnologias Ambientais (GESTA) 4/1: 18-40.
17. Surin ZS (Ed.) (1976): Resources on surface waters of the USSR. Vol. 10. The Upper-Volga area. (Resursy poverhnostnih vod SSSR, T.10 Verhne-Volgskiy Rayon), Moscow Dept. of Gidrometeoizdat
18. Zagorski GF (1967) Hydrological areas Kalinin region (by the nature of the water regime of the rivers) // Scientific notes of the Kalinin State Pedagogical Institute. Kalinin, Vol. 44. pp. 99-111.
19. Zimek A, Schubert E, Kriegel H-P (2012) A survey on unsupervised outlier detection in highdimensional numerical data. Statistical Analy Data Mining 5:363-387
20. Zhenikov YN, Kuzovlev VV, Schletterer M. (2007) Obosnovaniye programmy monitoringa i rezultaty issledovanij reki Tudovki (po gidrologicheskim, gidrohimicheskim i gidrobiologicheskim pokazatelam) - Description of the monitoring programme and the results of research on River Tudovka (hydrological, hydrochemical and hydrobiological parameters). Trudy Central’no-Lesnogo gosudarstvennogo prirodnogo biosfernogo Zapovednika 5: 407 - 419.