Shehzadi, S., A. Wasim, S. Hussain, M. Shafiq, and M. Jahanzaib. “Implementation Framework of ISO 22000 Food Safety Management System in Higher Educational Institutes (HEIs) Cafes of Pakistan”. The Nucleus, vol. 55, no. 4, Mar. 2019, pp. 200-18, http://thenucleuspak.org.pk/index.php/Nucleus/article/view/295.