Cockell, C., Pybus, D., Olsson-Francis, K., Kelly, L., Petley, D., Rosser, N., …Mosselmans, F. (2011). Molecular characterization and geological microenvironment of a microbial community inhabiting weathered receding shale cliffs. Microbial Ecology, 61(1), 166-181. https://doi.org/10.1007/s00248-010-9730-6