D. Scalone and  R. Palmeri and  F. Licciardello and  G. Muratore and  A. Todaro and  G. Spagna,  Influence of Degradative Enzymatic Activities on the Shelf Life of Ready-to-Eat Prickly Pear Fruits.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2012, vol. 72(12). 1113 - 1116
    [viewed 14 October 2019]. Available from: https://publications.waset.org/pdf/1888.