By Winka K.   Ahlberg C.   Eriksson O.E.   in Lichenologist

ISSN:0024-2829|30|4|455-462

Academic Press‎(1998)‎

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By Shoemaker R. A.   Holm L.   Eriksson O. E.   in Taxon

ISSN:1996-8175|52|3|623-625

International Association for Plant Taxonomy‎(2003)‎

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