1998

• Whitney, B. M. & Álvarez A., J.. 1998. A new Herpsilochmus antwren (Aves: Thamnophilidae) from northern Amazonian Peru and adjacent Ecuador: the role of edaphic heterogeneity of terra firme forest. The Auk 115(3):559-576. Full article (PDF)Reference page. 

1999

• Krabbe, N., Isler, M.L., Isler, P.R., Whitney, B.M., Álvarez A., J. & Greenfield, P.J.. 1999. A new species in the Myrmotherula haematonota superspecies (Aves: Thamnophilidae) from the western amazonian lowlands of Ecuador and Peru. The Wilson Bulletin 111 (2): 157–165. Full article (PDF).Reference page. 

2001

• Álvarez A., J., & Whitney, B.M.. 2001. A new Zimmerius tyrannulet (Aves: Tyrannidae) from white sand forests of northern Amazonian Peru. Wilson Bulletin 113: 1–9. AbstractReference page. 

• Isler, M.L.; Álvarez A., J.; Isler, P.R. & Whitney, B.M. (2001). A new species of Percnostola antbird (Passeriformes: Thamnophilidae) from Amazonian Peru, and an analysis of species limits within Percnostola rufifrons. The Wilson Bulletin 113:164–176. DOI: 10.1676/0043-5643(2001)113[0164:ANSOPA]2.0.CO;2 Full article PDFReference page. 

2002

• Isler, M. L., Álvarez A., J., Isler, P.R., Valqui, T., Begazo, A. & Whitney, B.M. 2002. Rediscovery of a cryptic species and description of a new subspecies in the Myrmeciza hemimelaena complex (Thamnophilidae) of the Neotropics. The Auk 119: 362–378 Full article view DOI: 10.1642/0004-8038(2002)119[0362:ROACSA]2.0.CO;2 Reference page. 

2005

• Whitney, B.M. & Álvarez A., J. (2005). A new species of gnatcatcher from white-sand forests of northern Amazonian Peru with revision of the Polioptila guianensis complex. The Wilson Bulletin 117(2):113-127. DOI: 10.1676/04-064 . ISSN 0043-5643. AbstractReference page. 

2006

• Lane, D.F., Valqui H., T., Alvarez A., J., Armenta J. & Eckhardt, K.. 2006. The rediscovery and natural history of the White-masked Antbird (Pithys castaneus). Wilson Journal of Ornithology 118: 13:22. Abstract and PreviewReference page.