Orange, Alan (2013). "Four new species of Verrucaria (Verrucariaceae, lichenized Ascomycota) from freshwater habitats in Europe". The Lichenologist. 45 (3): 305–322. doi:10.1017/s0024282912000898. S2CID83840672.
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Orange, Alan (2013). "Four new species of Verrucaria (Verrucariaceae, lichenized Ascomycota) from freshwater habitats in Europe". The Lichenologist. 45 (3): 305–322. doi:10.1017/s0024282912000898. S2CID83840672.