1. Baras, T. (2018) The quality standards for hydroponic lettuce.Retrieved on October 21, 2019, from: https://urbanagnews.com/blog/exclusives/the-quality-standards-for-hydroponic-lettuce/
2. Comparison of land, water, and energy requirements of lettuce grown using hydroponic vs. conventional agricultural methods;Barbosa;Int. J. Environ. Res. Public Health,2015
3. Baptista, P. (2014) Water use efficiency in hydroponics and aquaponics.Retrieved on September 26, 2019, from: http://blog.zipgrow.com/water-use-efficiency-hydroponics-aquaponics/
4. Determination of the moisture content of some fruits and vegetables by microwave heating;Canet;J. Microw. Power Electromagn. Energy,1988
5. Quantifying the water-energy-food nexus: current status and trends;Chang;Energies,2016