1. Variation and heredity of some characters in White Leghorns, Rhode Island Reds, and Barnevelders;Axelsson;I. Lunds Univ. Arsskrift. Nyfoljd Avdelningen 2,1932
2. A study of selections for the size, shape, and color of hen’s eggs;Benjamin;New York Agricultural Experiment Station Memoir,1920
3. The inheritance of egg shell color;Blow;Poultry Sci.,1950
4. Breeding for egg quality 3;Farnsworth;Genetic differences in shell characteristics and other egg quality factors. Poultry Sci.,1955
5. On measuring egg shell color in poultry breeding and selection programs;Gowe;Poultry Sci.,1965