Toscano de Brito, A., L. P. Felix, and G. V. Dornelas. “Zygostates aderaldoana—A New Species in the Ornithocephalus Group of Subtribe Oncidiinae (Orchidaceae) from Paraíba, Northeast Brazil”. Selbyana, vol. 29, no. 1, Feb. 2008, pp. 125-7, https://journals.flvc.org/selbyana/article/view/121218.