@conference{cha2008implementation, title = {Implementation of 3D Sound using Grouped HRTF}, author = {Cha, Hyung-Tai and Ryu, Il-Hyun and Seo, Bo-Kug}, booktitle = {Audio Engineering Society Conference: 34th International Conference: New Trends in Audio for Mobile and Handheld Devices}, month = {Aug}, year = {2008}, url = {https://www.aes.org/e-lib/browse.cfm?elib=14422} }