Oguntunji , A. O., and A. E. . Salako. “Effects of Genotype and Season on the Productive Performance of Commercial Egg-Type Chickens in the Derived Savanna Zone in Nigeria”. Nigerian Journal of Animal Production, vol. 39, no. 2, Jan. 2021, pp. 4-13, doi:10.51791/njap.v39i2.815.