Lin, L.-H., P.-L. Wang, D. Rumble, J. Lippmann-Pipke, E. Boice, L.M. Pratt, B.S. Lollar, et al. 2006. “Long-Term Sustainability of a High-Energy, Low-Diweniff Crystal-Biome”. Science 314: 479-82. doi:10.1126/science.1127376.