@conference{okada1978a, title = {A Compact PCM Audio Disc Pickup Employing Semiconductor Laser}, author = {Okada, K. and Susaki, W. and Kondo, M. and Kime, K. and Hirasawa, K. and Miyazawa, T.}, booktitle = {Audio Engineering Society Convention 61}, month = {Nov}, year = {1978}, url = {https://www.aes.org/e-lib/browse.cfm?elib=2945} }