Zi-Gui Huang and Tsung-Tsong Wu, Analysis of Wave Propagation in Two-dimensional Phononic Crystals with Hollow Cylinders. journal = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology. May 2009, vol. 29(5). 509 - 513 [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10607.