Identified as Marko Rosenmüller Identified as Christian Kästner This author has not been identified. It may be one of the following persons: Look up 'Norbert Siegmund' in GoogleIdentified as Sagar Sunkle This author has not been identified. It may be one of the following persons: Look up 'Sven Apel' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Thomas Leich' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Gunter Saake' in Google