This author has not been identified. Look up 'Laura Koesten' in GoogleThis author has not been identified. Look up 'Philipp Mayr' in GoogleThis author has not been identified. Look up 'Paul T. Groth' in GoogleThis author has not been identified. Look up 'Elena Simperl' in GoogleThis author has not been identified. It may be one of the following persons: Look up 'Maarten de Rijke' in Google