Nuraini, Sabrina, and S. A. Latif, “Fermented Product by Monascus purpureus in Poultry Diet: Effects on Laying Performance and Egg Quality”, Pak. J. Nutr., vol. 11, no. 7, pp. 605–608, Jun. 2012, doi: 10.3923/pjn.2012.605.608.