Naď, P. et al. 2020. Effect of dietary supplementation of humic substances on production performance and slaughter value of broiler chicken. Animal Welfare, Etológia és Tartástechnológia (AWETH). 16, 2 (Dec. 2020), 156–162. DOI:https://doi.org/10.17205/SZIE.AWETH.2020.2.156.