Barkindo, Hamida Muhammad, and Umar Saidu Bashir. “Determination of Some Virulence Factors and Antibiogram of Gram-Positive Bacteria Isolated from Vegetables (Spinach, Lettuce, Sorrel)”. African Journal of Agricultural Science and Food Research 4, no. 1 (June 30, 2022): 66–72. Accessed October 11, 2025. https://publications.afropolitanjournals.com/index.php/ajasfr/article/view/166.