Kellogg, T., Higgins, W.E. and Beckner, J. 2006. Reviewed Works: Icones Pleurothallidinarum XXIV: A First Century of New Species of Stelis of Ecuador by Carlyle A. Luer; A Treasure of Masdevallia, A Monograph of the Genus Masdevallia, Volume 27 by Carlyle A. Luer. Selbyana. 27, 1 (Feb. 2006), 101–105.