Tedersoo , L , Abarenkov , K , Nilsson , R H , Schuessler , A , Grelet , G-A , Kohout , P , Oja , J , Bonito , G M , Veldre , V , Jairus , T , Ryberg , M , Larsson , K-H & Koeljalg , U 2011 , ' Tidying up international nucleotide sequence databases : ecological, geographical and sequence quality annotation of its sequences of mycorrhizal fungi ' PLoS ONE , vol 6 , no. 9 , e24940 . DOI: 10.1371/journal.pone.0024940