Salim- ur-Rehman, Haq Nawaz, Sarfraz Hussain, Muhammad Mushtaq Ahmad, Mian Anjum Murtaza, and Mian Saeed Ahmad. 2007. “Effect of Sourdough Bacteria on the Quality and Shelf Life of Bread”. Pakistan Journal of Nutrition 6 (6): 562–565. https://doi.org/10.3923/pjn.2007.562.565.