Paz-Bermúdez, Graciela; Archer, Alan W.; Elix, John A. (2019). "A first approach to the lichen flora of Guinea-Bissau". The Bryologist. 122 (1): 151–157. doi:10.1639/0007-2745-122.1.151. S2CID181474326.
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Paz-Bermúdez, Graciela; Archer, Alan W.; Elix, John A. (2019). "A first approach to the lichen flora of Guinea-Bissau". The Bryologist. 122 (1): 151–157. doi:10.1639/0007-2745-122.1.151. S2CID181474326.