Template:Sipman et al., 2012a
- Sipman, H.J.M., Lücking, R., Aptroot, A., Chaves, J.L., Kalb, K. & Umaña-Tenorio, L. 2012. A first assessment of the Ticolichen biodiversity inventory in Costa Rica and adjacent areas: the thelotremoid Graphidaceae (Ascomycota: Ostropales). Phytotaxa 55(1): 1–214. DOI: 10.11646/phytotaxa.55.1.1
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