Vazquez, F. M., Suarez, M. A., & Baselga, M. P. (1996). Relation of the germination pollen grains "in vitro" with the temperature and humidity, from two species Fagaceae (Q. rotundifolia Lam. and Q. suber L.). Forest Systems, 5(2), 351-359. https://doi.org/10.5424/570