@incollection{GeyerSarradjFritzsche2013, author = {Thomas Geyer and Ennes Sarradj and Christoph Fritzsche}, title = {Nature-Inspired Porous Airfoils for Sound Reduction}, isbn = {978-3-642-28301-7}, doi = {10.1007/978-3-642-28302-4_21}, year = {2013}, }