This author has not been identified. Look up 'Philipp Kärger' in GoogleThis author has not been identified. Look up 'Daniel Olmedilla' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Fabian Abel' in GoogleThis author has not been identified. Look up 'Eelco Herder' in GoogleThis author has not been identified. Look up 'Wolf Siberski' in Google