Akhter, Marufa Zerin, et al. “Analysis of Antibiotics Susceptibility of Old and Fresh ATCC Strain of <i>Staphylococcus aureus< i> By Standard Agar Diffusion Technique”. Bangladesh Journal of Microbiology, vol. 24, no. 2, Oct. 2008, pp. 137-42, doi:10.3329/bjm.v24i2.1259.