@article{10_4153_CMB_1964_029_7,
     author = {Tiao, George C. and Guttman, Irwin},
     title = {Some {Useful} {Matrix} {Lemmas} in {Statistical} {Estimation} {Theory*}},
     journal = {Canadian mathematical bulletin},
     pages = {297--300},
     year = {1964},
     volume = {7},
     number = {2},
     doi = {10.4153/CMB-1964-029-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-029-7/}
}