Di Gioia, Francesco, Maria Gonnella, Vito Buono, Osman Ayala, and Pietro Santamaria. 2017. “Agronomic, Physiological and Quality Response of Romaine and Red Oak-Leaf Lettuce to Nitrogen Input”. Italian Journal of Agronomy 12 (1). https://doi.org/10.4081/ija.2017.806.