@article{wishart:1928:gpm,
    author = {Wishart, J.},
     title = {The generalised product moment distribution in samples from a
              normal multivariate population},
   journal = {Biometrika},
      year = {1928},
    volume = {20A},
     pages = {32–52},
     links = {\URL[FullText]{http://links.jstor.org/sici?sici=0006-3444%28192807%2920A%3A1%2F2%3C32%3ATGPMDI%3E2.0.CO%3B2-K}},
       doi = {10.1093/biomet/20A.1-2.32},
     zblno = {54.0565.02}}