HÁJEK, Michal,
Michal HORSÁK,
Petra HÁJKOVÁ a Daniel DÍTĚ. Habitat diversity of central European fens in relation to environmental gradients and an effort to standardise fen terminology in ecological studies.
Perspectives in Plant Ecology, Evolution and Systematics. Zürich: Elsevier, 2006, roč. 8, č. 2, s. 97-114. ISSN 1433-8319.