Dey, B., B. Ray, and D. Saha. “Dietary Supplementation of Sodium Bicarbonate, Probiotic and L-Ascorbic Acid Affects Laying Performance and Eggshell Quality in Older Hens”. Bangladesh Journal of Animal Science, vol. 50, no. 2, Feb. 2022, pp. 92-98, doi:10.3329/bjas.v50i2.58136.