[39] Yuang-Shung Lee et al., 2006 Quasi-Resonant Zero-Current-Switching Bidirectional Converter for Battery Equalization Applications - download at 4shared. [39] Yuang-Shung Lee et al., 2006 Quasi-Resonant Zero-Current-Switching Bidirectional Converter for Battery Equalization Applications is hosted at free file sharing service 4shared.