This author has not been identified. Look up 'Michael Vistein' in GoogleThis author has not been identified. Look up 'Andreas Angerer' in GoogleThis author has not been identified. Look up 'Alwin Hoffmann' in GoogleThis author has not been identified. Look up 'Andreas Schierl' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Wolfgang Reif' in Google