 
                                    
                                    Taxonomic Studies in the Genus Heterococcus (Tribophyceae, Tribonematales, Heteropediaceae). A combined cultural and electron microscopy study - Cryptogamic Studies Vol 3, edited by Walter Jülich
                                    Taxonomic Studies in the Genus Heterococcus (Tribophyceae, Tribonematales, Heteropediaceae). A combined cultural and electron microscopy study - Cryptogamic Studies Vol 3, edited by Walter Jülich