@article{levinson:1974:mot,
    author = {Levinson, Norman},
     title = {More than one third of zeros of {R}iemann's zeta-function are
              on {$\sigma =\frac{1}{2}$}},
   journal = {Advances in Math.},
    volume = {13},
      year = {1974},
     pages = {383–436},
    number = {4},
   mrclass = {10H05},
  mrnumber = {MR0564081 (58 \#27837)},
mrreviewer = {H. L. Montgomery},
       doi = {10.1016/0001-8708(74)90074-7},
     zblno = {0281.10017}}