Hamidu J A, Adomako K, Adamu S, Ajaottor A M, Amankwah G J, Gyasi K M, Shiburah E M, Darko J O and Konadu L A 2018:  
Impact of layer egg storage conditions on eggs and embryo quality indices prior to incubation. 
 Livestock Research for Rural Development. Volume 30, Article #184. 
 Retrieved 
, from http://www.lrrd.org/lrrd30/11/jaham30184.html