1980

• Devries, P.J. 1980: Description, natural history, and distribution of a new species Eretris (Satyridae) from Costa Rica. Journal of the Lepidopterists' Society, 34(2): 146–151. Full article (PDF)Reference page. 

1982

• Singer, M.C., DeVries, P.J. & Ehrlich, P.R. 1983. The Cissia confusa species-group in Costa Rica and Trinidad (Lepidoptera:Satyrinae). Zoological Journal of the Linnean Society 79(2): 101–119 DOI: 10.18473/lepi.70i4.a8 . Reference page. 

1996

• Devries, P.J.; Hall, J.P.W. 1996: Two new species of Costa Rican butterflies (Lepidoptera: Riodinidae). Tropical Lepidoptera, 7(1): 87–90. First page (PDF) Reference page. 

2006

• Penz,C. & Devries, P., 2006. Systematic position of Apodemia paucipuncta (Riodinidae), and a critical evaluation of the nymphidiine transtilla. Zootaxa 1190: 1–50, 20 pls. Reference page. 

2014

• Penz, C.M., Alexander, L.G. & Devries, P.J. 2014: Revised species definitions and nomenclature of the rose colored Cithaerias butterflies (Lepidoptera, Nymphalidae, Satyrinae). Zootaxa 3873(5): 541–559. DOI: 10.11646/zootaxa.3873.5.5 Reference page. 

2017

• Penz, C.M., Casagrande, M.M., DeVries, P. & Simonsen, T.J. 2017. Documenting diversity in the Amazonian butterfly genus Bia (Lepidoptera, Nymphalidae). Zootaxa 4258(3): 201–237. DOI: 10.11646/zootaxa.4258.3.1 . Reference page. 

2018

• Chacón, I.A., Devries, P.J. & Penz, C.M. 2018. Description of a New Subspecies of Cunizza hirlanda (Pieridae: Anthocharidini) from Costa Rica. Journal of the Lepidopterists' Society 72(2): 121-126. Reference page. 

• Seraphim, N., Kaminski, L.A., DeVries, P.J., Penz, C.M., Callaghan, C.J., Wahlberg, N., Silva-Brandão, K.L. & Freitas, A.V.L. 2018. Molecular phylogeny and higher systematics of the metalmark butterflies (Lepidoptera: Riodinidae). Systematic Entomology 43(2): 407–425. DOI: 10.1111/syen.12282 Reference page.