Gewehr, Clóvis Eliseu, and Henrique Jorge de Freitas. 2007. “Intermittent Lighting for Layer Hens Rearing in Open Shelters”. Revista De Ciências Agroveterinárias 6 (1). Lages:54-62. https://revistas.udesc.br/index.php/agroveterinaria/article/view/5350.