F. Pupulin, M. Díaz-Morales, J. Aguilar, and M. Fernández, “Two new species of <i>Pleurothallis</i> (Orchidaceae: Pleurothallidinae) allied to <i>P. cardiothallis</i>, with a note on flower activity”, LIJO, vol. 17, no. 2, Aug. 2017.