ZILDA, D.S. et al. 2013. Optimization of Culture Conditions to Produce Thermostable Keratinolytic Protease of Brevibacillus thermoruber LII, Isolated from the Padang Cermin Hot Spring, Lampung, Indonesia. Microbiology Indonesia. 6, 4 (Apr. 2013), 8. DOI:https://doi.org/10.5454/mi.6.4.8.