1. Acustica;Ahrens;Luftschalldampfung in turbulenten durchstromten, schallharten Rohren bei verschiedenen Wandrauhigkeiten,1971
2. Journal of the Acoustical Society of America;Ingard;Sound attenuation in turbulent pipe flow,1974
3. Interaction between viscous waves and close-to-the-wall turbulence in Newtonian and non-Newtonian fluids;Ahrens,1974
4. A precise measurement 0f the sound attentuation in air flowing through rigid pipes and its application in turbulence research;Ronneberger,1974
5. Journal of Sound and Vibration;Kuhn;Noise due to fully developed turbulent flow exhausting from straight and bent pipes,1975