This author has not been identified. Look up 'Michael Schäfer 0003' in GoogleThis author has not been identified. Look up 'Sophie Pientka' in GoogleThis author has not been identified. Look up 'Jonathan Pfaff' in GoogleThis author has not been identified. Look up 'Heiko Schwarz' in GoogleThis author has not been identified. Look up 'Detlev Marpe' in GoogleThis author has not been identified. Look up 'Thomas Wiegand' in Google