Tugiyanti , Elly, et al. “Improving Performance, Meat Quality and Muscle Fiber Microstructure of Native Indonesian Muscovy Duck Through Feed Protein and Metabolizable Energy”. International Journal of Poultry Science, vol. 12, no. 11, Oct. 2013, pp. 653–659, https://doi.org/10.3923/ijps.2013.653.659.