Győri, Zsolt, et al. “„Kindergarten” Keeping-System in Farrowing House: Effect on Reducing the Weaning-Stress”. Animal Welfare, Ethology and Housing Systems (AWETH), vol. 11, no. 2, Dec. 2015, pp. 90-95, https://doi.org/10.17205/SZIE.AWETH.2015.2.90.