1. A.R. Long, J.E. Roybal, Drug residues in foods of animal origin, in: Y.H. Hui, J.R. Gorham, K.D. Murrell, D.O. Cliver (Eds.), Foodborne Disease Handbook, Diseases Caused by Hazardous Substances, vol. 3, Marcel Dekker, New York, NY, 1994, Chapter 10, p. 529.
2. C.C. Walker, S.B. Turnipseed, Sulfonamides and diaminopyrimidines, in: S.B. Turnipseed, A.R. Long (Eds.), Analytical Procedures for Drugs Residues in Food of Animal Origin, Science Technology System, West Sacramento, CA, 1998, Chapter 15, p. 317.
3. UV spectrophotometric flow-injection assay of tetracycline antibiotics retained on Sephadex QAE A-25 in drug formulations
4. Thin-layer chromatography on Sephadex for the identification of antibiotics