Dalström, S., and S. Ruíz Pérez. “Two New Similar Species of <i>Masdevallia</i≫ (Orchidaceae: Pleurothallidinae) from Pasco, Peru”. Lankesteriana: International Journal on Orchidology, vol. 15, no. 1, Mar. 2015, doi:10.15517/lank.v15i1.18524.