References should be arranged as follow:
a. Articles from journals:
Baker, A. M., D. E. Drapers, 1995. J. Biol. Chem., 270 (39), 22939 - 22945.
b. Articles from contributor-type books:
Goodfellow, M., T. Cross, 1984. Classification. In: Biology of the actinomycetes, M. Goodfellow, M. Mordarski, S. T. Williams (Eds), London: Acad. Press, 7-164.
c. Books:
Lewin, B., 1987. Genes, sev. edn, New York: John Wiley & Sons.
d. Articles from scientific meetings:
Zorenzana, Z. M., E. Beates, M. Z. Zopez, 1992. 6th International Symposium on Microbiology and Ecology, 6-11 Sept., Barcelona, Spain, abstracts, 224.