@article{10_4153_CMB_1973_063_8,
     author = {Shreveo, Warren E.},
     title = {A {Converse} {Problem} in {Matrix} {Differential} {Equations}},
     journal = {Canadian mathematical bulletin},
     pages = {401--403},
     year = {1973},
     volume = {16},
     number = {3},
     doi = {10.4153/CMB-1973-063-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-063-8/}
}