R. Murwani and B. Bayuardhi, “Broilers Serum Cholesterol and Glutamic Oxaloacetic Transaminase and Their Relation to Antibiotic in Feed and Medication Programs in Four Broiler Producers in Semarang Region-Central Java, Indonesia”, Int. J. Poult. Sci., vol. 6, no. 4, pp. 266–270, Mar. 2007, doi: 10.3923/ijps.2007.266.270.