@article{10_21136_CMJ_1971_101066,
     author = {Hallam, Thomas G.},
     title = {Asymptotic integration of a nonhomogeneous differential equation with integrable coefficients},
     journal = {Czechoslovak Mathematical Journal},
     pages = {661--671},
     year = {1971},
     volume = {21},
     number = {4},
     doi = {10.21136/CMJ.1971.101066},
     mrnumber = {0291573},
     zbl = {0231.34018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101066/}
}