1. Blazevic D. J. and G. M. Ederer. 1975. Principles of biochemical tests in diagnostic microbiology p. 82 and 125. John Wiley & Sons Inc. New York.
2. Cowan S. T. (ed.). 1974. Cowan and Steel's manual for the identification of medical bacteria 2nd rev. ed. p. 167. Cambridge University Press Cambridge.
3. Hugh R. 1978. Classical methods for isolation and identification of glucose nonfermenting gram-negative rods. p. 9. In G. L. Gilardi (ed.) Glucose nonfermenting gramnegative bacteria in clinical microbiology. CRC Press Inc. West Palm Beach Fla.
4. Kingma Boltjes T. Y. 1957. Vorm en levensverrichtingen der bacterien p. 148. In A. C. Ruys (ed.) Leerboek der microbiologie en immnunologie 3rd ed. Oosthoek Utrecht The Netherlands.
5. MacFaddin J. F. 1980. Biochemical tests for identification of medical bacteria 2nd ed. p. 239. The Williams & Wilkins Co. Baltimore.