Apostol, Ma. Harriette C., et al. “A Comparative Analysis of the Stomatal Density of Ficus Septica Burm. F. Along an Altitudinal Gradient at the Kalungan Forest of Mt. Talinis, Bacong, Negros Oriental”. Annals of Tropical Research, vol. 35, no. 1, June 2013, pp. 105-17, doi:10.32945/atr3517.2013.