@article{barouch:1973:zfs,
    author = {Barouch, E. and McCoy, B.~M. and Wu, T.~T.},
     title = {Zero-field susceptibility of the two-dimensional {I}sing model near $T_c$},
   journal = {Phys. Rev. Lett.},
      year = {1973},
    volume = {31},
     pages = {1409–1411},
       doi = {10.1103/PhysRevLett.31.1409}}