1. Ziemiński, K., Frac, M.: Methane fermentation process as anaerobic digestion of biomass: transformations, stages and microorganisms. Afr. J. Biotechnol. 11, 4127–4139 (2012)
2. Holm-Nielsen, J., Seadi, T.A., Oleskowicz-Popiel, P.: The future of anaerobic digestion and biogas utilization. Bioresour. Technol. 100, 478–5484 (2009)
3. Bjornsson, L.: Intensification of the biogas process by improved process monitoring and biomass retention. Ph.D. thesis, Department of Biotechnology, Lund University, Sweden (2000)
4. Prokopová, Z., Prokop, R.: Modelling and simulation of dry anaerobic fermentation. In: European Conference on Modelling and Simulation, pp. 200–205 (2010)
5. Ralph, M., Dong, G.J.: Environmental Microbiology, 2nd edn. Wiley, New York (2010)