@article{schjonneberg1961listening, title = {Listening Tests Methods and Evaluation}, author = {Schjonneberg, K. and Olson, F.}, journal = {J. Audio Eng. Soc}, volume = {9}, number = {1}, pages = {29--36}, year = {1961}, url = {https://www.aes.org/e-lib/browse.cfm?elib=486} }