Brackel, W. and Döbbeler, P. 2020. An addition to the knowledge of lichenicolous fungi of Greece with a key to the lichenicolous fungi on Collema s.l. Folia Cryptogamica Estonica. 57, (Oct. 2020), 147–152. DOI:https://doi.org/10.12697/fce.2020.57.13.