Fries, T. M. (1861). Genera heterolichenum Europaea recognita. Edquist et Soc..
Lua i Stíl Chicago (17ú heag.)Fries, Theodor Magnus. Genera Heterolichenum Europaea Recognita. Upsaliae: Edquist et Soc., 1861.
Lua MLA (8ú heag.)Fries, Theodor Magnus. Genera Heterolichenum Europaea Recognita. Edquist et Soc., 1861.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.