Soebandrio, A., Sri-Budayanti, N. N., Widayati, A., Wiwing, V. and Nusatya, M. A. (2004) “Role of β−lactamase in the susceptibility of clinical isolates to β−lactam antibiotics”, Medical Journal of Indonesia, 13(3), pp. 140-5. doi: 10.13181/mji.v13i3.147.