@article{10_1017_S0017089500003839,
     author = {Young, N. J.},
     title = {Linear fractional transforms of companion matrices},
     journal = {Glasgow mathematical journal},
     pages = {129--132},
     year = {1979},
     volume = {20},
     number = {2},
     doi = {10.1017/S0017089500003839},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003839/}
}