Sudarwanto, Mirnawati Bachrum, et al. “CTX-M-15 and CTX-M-55 Producing Escherichia Coli in Milk from Dairy Farms in West Java, Indonesia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 31, no. 1, Jan. 2017, pp. 409-16, https://gssrr.org/JournalOfBasicAndApplied/article/view/6777.