Reference
Maria DeLos Angeles Herrera-Campos, Paola Martinez Colin, Alexandrina Barcenas Pena, Robert Lücking (2004): The Foliicolous Lichen Flora of Mexico. III. New Species from Volcán San Martín Tuxtla (Sierra de Los Tuxtlas), Veracruz, with Notes on Fellhanera santessonii. – Phyton, Annales Rei Botanicae, Horn – 44_2: 167 - 183.