Reference
Martin Backor, Jan Hudak, Miriam Backorova (1998): Comparison between Growth Responses of Autotrophic and Heterotrophic Populations of Lichen Photobiont Trebouxia irregularis (Chlorophyta) on Cu, Hg and Cd Chlorides Treatment. – Phyton, Annales Rei Botanicae, Horn – 38_2: 239 - 250.