@article{10_21136_CMJ_1986_102121,
     author = {Trench, William F.},
     title = {Linear perturbations of a constant coefficient differential equation subject to mild integral smallness conditions},
     journal = {Czechoslovak Mathematical Journal},
     pages = {623--633},
     publisher = {mathdoc},
     volume = {36},
     number = {4},
     year = {1986},
     doi = {10.21136/CMJ.1986.102121},
     mrnumber = {863192},
     zbl = {0623.34059},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1986.102121/}
}