Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Osawa Hisashi and Iketani Akira and Tazaki Saburo,Performance Comparison of Signal Detection Methods in Viterbi Decoding for NRZL Recording Code,The Journal of the Institute of Television Engineers of Japan,03866831,The Institute of Image Information and Television Engineers,1981,35,7,570-575,https://cir.nii.ac.jp/crid/1390001205065546112,https://doi.org/10.3169/itej1978.35.570