H. Tahir, U. Bacha, S. Iqbal, S. S. Iqbal, and A. Tanweer, “Development of prebiotic galactooligosaccharide enriched buttermilkand evaluation of its storage stability: Prebiotic Galactooligosaccharide Enriched Buttermilk”, Progr Nutr, vol. 21, no. 4, pp. 935–942, Dec. 2019, doi: 10.23751/pn.v21i4.7579.