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WO2011006939A2   [0002]  [0003] 
WO2009008709A1   [0004] 
US20100304226A1   [0005] 
US20140030555A1   [0005] 
US20120132521A1   [0005] 
US3340094A   [0006] 

An Inductorless DC-DC Converterfor an Energy Aware Power Management Unit Aimed at Microbial Fuel Cell Arrays   [0007] 
Hysteresis-Controller-Based Energy Harvesting Scheme for Microbial Fuel Cells With Parallel Operation Capability   [0008] 
Microbial fuel cells for energy production from wastewaters: the way toward practical application   [0009]