Bonachela, S., R. A. Acuña, J. J. Magan, and O. Marfa. 2010. “Oxygen Enrichment of Nutrient Solution of Substrate-Grown Vegetable Crops under Mediterranean Greenhouse Conditions: Oxygen Content Dynamics and Crop Response”. Spanish Journal of Agricultural Research 8 (4), 1231-41. https://doi.org/10.5424/sjar/2010084-1203.