REFERENCES
- Barkman, J., Doing, H., Segal, S. (1964) Act. Bot. Neederland., 13, 394–419.
- Braun—Blanquet, J. (1964). Pflanzenzociologie—Grundzuege der Vegetationskunde. Vien, N.Y., Spinger-Verlag, 865
- Horvat, I., Glavac, V. & Ellenberg, H. (1974) Vegetation Sudosteuropas. - G. Verlag, Stuttgart, 768.
- Kochev, H., Yordanov, D. (1981) Rastitelnost na vodoemite v Bulgaria. BAN, Sofia. 183 pp./in Bulgarian/.
- Kochev, H., Husak, S., Otahelova, H. (1986) In: Collected works of the International symposium “The Role of wetlands in preserving the genetic material”, Srebarna, 8–12 October 1984, BAS, Sofia, pp 81–98/in Russian/.
- Kozhuharov, S. (ed.) (1992) Opredelitel na visshite rastenia v Bulgaria.—Nauka i Izkustvo, Sofia. 788 pp./in Bulgarian/.
- Krebs, C. (1999) Ecological methodology. 2 Ed. Benjamin/Cummings publ., Menlo Park, California, 420 pp.
- Ninov, N. (2002) In: Kopralev, I. (ed.): Geography of Bulgaria. ForCom, Sofia, pp. 277–315/in Bulgarian/.
- van der Maarel, E. (1979) Vegetatio, 39(2),97–114.
- Rodwell, J., Schamenee, J., Mucina, L., Pignatti, Dring, J. & Moos, D. (2002) The Diversity of European Vegetation. An overview of phytosociological Alliances and their relationships to EUNIS habitats. Landbouw, natuurbeheer en visserij. Wageningen. 168 p.
- Roussakova, V. & Tzonev, R. (2000) Fitosociologia, 40(1) 23–31.
- Tzonev, R. (2002) Flora i rastitelnost v Sredna Dunavska ravnina mezhdu dolinite na rekite Vit i Studena. PhD thesis; SU “St. Kliment Ohridski”, Sofia. 166 p./in Bulgarian/.
- Tzonev, R. (2003) Sintaxonomia na gorite ot srebrolistna lipa (Tilia tomentosa Moench.) v Sredna Dunavska ravnina—V: International Scientific Conference “75 years Institute of forests, BAS”, Sofia 1–5 Octomber 2003 Γ., Proceedings of scientific reports, V. I: 260–265/in Bulgarian/.
- Tzonev, R. (2008) In: Ivanova, D. (Ed.). Proceedings of the IVth Balkan Botanical Congress, BAS, Sofia/in press./.
- Velev, S. (1990) Klimatut na Bulgaria. Narodna prosveta, Sofia, 179 pp./in Bulgarian/.
- Weber, H.E., Moravec, J., Theurillat, J.-P. (2000) International Code of Phytosociological Nomenclature. 3rd edition.—J. Veg. Sci., 11, 739–768.
- Westhoff, V. & Van der Maarel, E. (1978) In: Whittaker, R.H. (ed.): Classification of plant communities. Junk, The Hague, pp. 287–399.