This author has not been identified. Look up 'Maria Becker' in GoogleThis author has not been identified. Look up 'Ioana Hulpus' in GoogleThis author has not been identified. Look up 'Juri Opitz' in GoogleThis author has not been identified. Look up 'Debjit Paul' in GoogleThis author has not been identified. Look up 'Jonathan Kobbe' in GoogleThis author has not been identified. Look up 'Heiner Stuckenschmidt' in GoogleThis author has not been identified. Look up 'Anette Frank' in Google