References
- Bollard, E. 1966. A comparative study of the ability of organic nitrogenous compounds to serve as sole source of nitrogen for growth of plants. Plant Soil 25: 153–166.
- Kapustka, L.A. & M. Reporter. 1994. Terrestrial primary producers, p. 278–299. In P. Calow [ed.], Handbook of Ecotoxicology. Oxford Blackwell Scientific Publications London Edinburgh Boston.
- Romanowska-Duda, Z., M. Grzesik, J.T. Mankiewicz & M. Zalewski. 2006. Bioindication of microcistins toxicity by germinating seeds, p. 243–252. In A.G. Kungolos, C.A. Brebbia, C. P. Samaras & V Popov [eds.], Environmental Toxicology. WITPRESS.
- Romanowska-Duda, Z. 2007. Spirodela oligorrhiza (Kurz.) Hegelm. as bioindicator of toxicity of land water by hepatotoxins of cyanobacteria. Ph.D. dissertation, University of Lodz, Poland (in Polish).