Sgard, F., Olny, X., Atalla, N., & Castel, F. (2005). On the use of perforations to improve the sound absorption of porous materials. Applied acoustics, 66(6), 625-651. https://doi.org/10.1016/j.apacoust.2004.09.008
Chicago Style (17th ed.) CitationSgard, F.C, X. Olny, N. Atalla, and F. Castel. "On the Use of Perforations to Improve the Sound Absorption of Porous Materials." Applied Acoustics 66, no. 6 (2005): 625-651. https://doi.org/10.1016/j.apacoust.2004.09.008.
MLA (9th ed.) CitationSgard, F.C, et al. "On the Use of Perforations to Improve the Sound Absorption of Porous Materials." Applied Acoustics, vol. 66, no. 6, 2005, pp. 625-651, https://doi.org/10.1016/j.apacoust.2004.09.008.
Warning: These citations may not always be 100% accurate.