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PYRZAK, R., & SIOPES, T. D. (1989). CHARACTERISTICS OF OVIPOSITION PATTERNS OF TURKEY HENS AND THE INFLUENCE OF DIFFERENT WAVELENGTHS OF LIGHT. BRITISH POULTRY SCIENCE, 30(1), 151–160. https://doi.org/10.1080/00071668908417133

PYRZAK, R., & SIOPES, T. D. (1986). EFFECT OF LIGHT QUALITY ON ERRATIC EGG-LAYING OF CAGED TURKEY HENS. POULTRY SCIENCE, 65(4), 795–800. https://doi.org/10.3382/ps.0650795