@article{10_1017_S0017089500000653,
     author = {Wong, James S. W.},
     title = {Remarks on the asymptotic behaviour of perturbed linear systems{\textdagger}},
     journal = {Glasgow mathematical journal},
     pages = {116--120},
     year = {1969},
     volume = {10},
     number = {2},
     doi = {10.1017/S0017089500000653},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000653/}
}