This author has not been identified. Look up 'Alexander Best' in GoogleThis author has not been identified. Look up 'Christian Borowski' in GoogleThis author has not been identified. Look up 'Karin Büttner' in GoogleThis author has not been identified. Look up 'Rita Freudenberg' in GoogleThis author has not been identified. Look up 'Martin Fricke' in GoogleThis author has not been identified. Look up 'Kathrin Haselmeier' in GoogleThis author has not been identified. Look up 'Henry Herper' in GoogleThis author has not been identified. Look up 'Volkmar Hinz' in GoogleThis author has not been identified. Look up 'Ludger Humbert' in GoogleThis author has not been identified. Look up 'Dorothee Müller' in GoogleThis author has not been identified. Look up 'Marco Thomas' in Google