Di Gioia, F., Gonnella, M., Buono, V., Ayala, O. and Santamaria, P. 2017. Agronomic, physiological and quality response of romaine and red oak-leaf lettuce to nitrogen input. Italian Journal of Agronomy. 12, 1 (Mar. 2017). DOI:https://doi.org/10.4081/ija.2017.806.