Pompa, Marianna, Marcella Michela Giuliani, Luigia Giuzio, Anna Gagliardi, Natale Di Fonzo, and Zina Flagella. 2009. “Effect of Sulphur Fertilization on Grain Quality and Protein Composition of Durum Wheat (Triticum Durum Desf.)”. Italian Journal of Agronomy 4 (4), 159-70. https://doi.org/10.4081/ija.2009.4.159.