Template:Aptroot, 2003a
- Aptroot, A. 2003. A New Perspective on the Sorediate Punctelia (Parmeliaceae) Species of North America. The Bryologist 106(2): 317–319. RLL List # 191 / Rec.# 24592 – Recent Literature on Lichens DOI: 10.1639/0007-2745(2003)106[0317:ANPOTS]2.0.CO;2