D. MALLE, J. PICARIMA, L. C. HUWAE, I. RAHMAWATI, and W. PURBOWASITO, “Isolation and Identification of a Thermostable Amylase-Producing Bacterium from Hatuasa Hotspring”, Microbiol indones, vol. 6, no. 2, p. 5, Jun. 2012.