Toma, C. 2006. Distribution and comparison of two morphological forms of water soldier (Stratiotes aloides L.): a case study on Lake Słosineckie Wielkie (Northwest Poland). Biodiversity: Research and Conservation. 3-4 (Dec. 2006), 251–257. DOI:https://doi.org/10.14746/biorc.2006.3-4.12.