Square roots of real 3x3 matrices vs. quartic polynomials with real zeros
Analele Universităţii "Ovidius" Constanţa Seria Matematică, XXV (2017) no. 3.

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@article{ASUO_2017_XXV_3_a7,
     author = {Nicolae Anghel},
     title = {Square roots of real 3x3 matrices vs. quartic polynomials with real
                            zeros},
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XXV},
     number = {3},
     year = {2017},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2017_XXV_3_a7/}
}
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                            zeros
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Nicolae Anghel. Square roots of real 3x3 matrices vs. quartic polynomials with real
                            zeros. Analele Universităţii "Ovidius" Constanţa Seria Matematică, XXV (2017) no. 3. http://geodesic.mathdoc.fr/item/ASUO_2017_XXV_3_a7/