Template:Fryday, 2005

• Fryday, A.M. 2005. The genus Porpidia in northern and western Europe, with special emphasis on collections from the British Isles. The Lichenologist 37(1): 1–35. DOI: 10.1017/S0024282904014628 . ResearchGate .  
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  • RLL List # 198 / Rec.# 26669 – Recent Literature on Lichens