1. Aesop Rutgers (2015), Environmental Factors Influencing Vegetable Crop Growth and Production – lecture2.pdf, available at: http://aesop.rutgers.edu/∼horteng/workshop/lecture2.pdf
2. Ames, M.J. and Wayne, S. (2015), Hydrofarm – a Review of Factors Affecting Plant Growth, available at: www.hydrofarm.com/resources/articles/factors_plantgrowth.php
3. Arizona (2015), AZ Master Gardener Manual: Environmental Factors, available at: https://ag.arizona.edu/pubs/garden/mg/botany/environmental.html