M. Z. Akhter, I. Khalil, P. Roy, and M. M. I. Masud, “Analysis of Antibiotics Susceptibility of Old and Fresh ATCC Strain of <i>Staphylococcus aureus</i> by Standard Agar Diffusion Technique”, Bangla. J. Microbiol., vol. 24, no. 2, pp. 137–142, Oct. 2008.