BILLARD, L.; SHIM, M.Y.; PESTI , G.M. Experimental Design and Analysis with Emphasis on Communicating What Has Been Done: (II) Calculating Interaction Contrasts with SAS. International Journal of Poultry Science, Pakistan, v. 13, n. 2, p. 88–96, 2014. DOI: 10.3923/ijps.2014.88.96. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/2019. Acesso em: 22 sep. 2025.