Ahammed, M., S. Sharmin, A. Khatun, and K. Islam. “Supplementation of Spirulina (Spirulina Platensis) on Yolk Colour, Egg Quality and Production Performance of Laying Hens”. Bangladesh Veterinarian, Vol. 34, no. 2, Dec. 2018, pp. 71-78, doi:10.3329/bvet.v34i2.49890.