Reference
Karel V. Sykora, Victor Westhoff (1985): Synecology and syntaxonomy of Apium repens (Jacq.) Lag. and Scirpus cariciformis Vest., in particular in the eastern part of Zeeuws-Vlaanderen (Province of Zeeland, the Netherlands) – Tuexenia - Mitteilungen der Floristisch-soziologischen Arbeitsgemeinschaft – NS_5: 41 - 57.