1. AccuWeather. 2022. Amecameca de Juárez, México. https://www.accuweather.com/es/mx/amecameca-de-ju%C3%A1rez/233924/january-weather/233924?year=2021. (28 de mayo de 2022).
2. Aderkas, P., L. Kong, S. Abrams, I. Zaharia, S. Owens and B. Porter. 2004. Flower induction methods for lodgepole pine and Douglas-fir. Centre for Forest Biology and University of Victoria. Victoria, BC, Canada. 59 p.
3. Alizoti, P. G., K. Kilimis and P. Gallios. 2010. Temporal and spatial variation on flowering among Pinus nigra Arn. clones under changing climatic conditions. Forest Ecology and Management 259(4):786-797 Doi: 10.1016/j.foreco.2009.06.029.
4. Askew, G. R. 1988. Estimation of gamete pool compositions in clonal seed orchards. Silvae Genetica 37(5-6):227-232. https://www.thuenen.de/media/institute/fg/PDF/Silvae_Genetica/1988/Vol._37_Heft_5-6/37_5-6_227.pdf. (20 de junio de 2022).
5. Barner, H. and H. Christiansen. 1962. The formation of pollen, the pollination mechanism, and the determination of the most favorable time for controlled pollination in Pseudotsuga menziesii. Silvae Genetica 11:89-102. https://www.thuenen.de/media/institute/fg/PDF/Silvae_Genetica/1962/Vol._11_Heft_4/11_4__89.pdf. (20 de junio de 2022).