To cite PlutoF please use
Abarenkov, Kessy; Tedersoo, Leho; Nilsson, R. Henrik; Vellak, Kai; Saar, Irja; Veldre, Vilmar; Parmasto, Erast; Prous, Marko; Aan, Anne; Ots, Margus; Kurina, Olavi; Ostonen, Ivika; Jõgeva, Janno; Halapuu, Siim; Põldmaa, Kadri; Toots, Märt; Truu, Jaak; Larsson, Karl-Henrik; Kõljalg, Urmas (2010). PlutoF - a Web Based Workbench for Ecological and Taxonomic Research, with an Online Implementation for Fungal ITS Sequences. Evolutionary Bioinformatics, 6, 189 - 196