I. M. Shihab, “Effects of Different Dietary Levels of Palm Pollen (Phoenix dactylifera L.) On the Humoral Immunity and Hematology of Broiler Blood”, Int. J. Poult. Sci., vol. 17, no. 11, pp. 523–528, Oct. 2018, doi: 10.3923/ijps.2018.523.528.