Mukhtar, U. A., S. Shodiya, S. A. Abdulrahaman, V. C. Samuel, A. Muhammed, and A. Y. Maigida. “Experimental Investigation of the Performance of a Household Refrigerator Using Plywood As Radiation Shield”. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT, Vol. 17, no. 2, June 2021, pp. 165-72, https://azojete.com.ng/index.php/azojete/article/view/419.