Allgaier C. (2007). "Active Camouflage with Lichens in a Terrestrial Snail, Napaeus (N.) barquini Alonso and Ibáñez, 2006 (Gastropoda, Pulmonata, Enidae)". Zoological Science24(9): 869–876. doi:10.2108/zsj.24.869.
Holyoak G. A., Holyoak D. T., Yanes Y., Alonso M. R., Ibanez M. (2011). "Two new Napaeus species from La Gomera and La Palma (Canary Islands) (Gastropoda: Pulmonata: Enidae) ". Archiv für Molluskenkunde140(1): 37–48. doi:10.1127/arch.moll/l869-0963/l40/037.
Alonso M. R., Goodacre S. L., Emerson B. C., Ibáñez M., Hutterer R. & Groh K. (2006). "Canarian land snail diversity: conflict between anatomical and molecular data on the phylogenetic placement of five new species of Napaeus (Gastropoda, Pulmonata, Enidae)". Biological Journal of the Linnean Society89: 169–187. doi:10.1111/j.1095-8312.2006.00670.x.
Yanes Y., Santana J., Artiles M., Deniz F., Martin J., Alonso M. R. & Ibanez M. (2011). "Five new Napaeus species (Gastropoda: Pulmonata: Enidae) from Gran Canaria and El Hierro (Canary Islands)." Zootaxa2901: 35–51. abstract.
Yanes Y., Martín J., Santana J., Holyoak G. A., Holyoak D. T., Artiles M., Deniz F. et al. & Ibáñez M. (2011). "Four new Napaeus species (Gastropoda: Pulmonata: Enidae) from La Gomera (Canary Islands)". Journal of Conchology40(4): 393–407. abstract.