@conference{evans1997spherical, title = {Spherical Harmonic Spectra of Head-Related Transfer Functions}, author = {Evans, Michael J. and Angus, James A. S. and Tew, Anthony I.}, booktitle = {Audio Engineering Society Convention 103}, month = {Sep}, year = {1997}, url = {https://www.aes.org/e-lib/browse.cfm?elib=7208} }