C. Kosma, V. Triantafyllidis, A. Papasavvas, G. Salahas, and A. Patakas, “YIELD AND NUTRITIONAL QUALITY OF GREENHOUSE LETTUCE AS AFFECTED BY SHADING AND CULTIVATION SEASON”, Emir J Food Agric, vol. 25, no. 12, pp. 974–979, Nov. 2017.