@article{PORMA_1975__34_1_115251,
     author = {Silva Oliveira, J.},
     title = {Sur une m\'ethode de resolution de l{\textquoteright}\'equation $U^{\prime }(t)+b_0 U(t)+b_l U(t-\omega )=f(t)$},
     journal = {Portugaliae mathematica},
     pages = {49--68},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1975},
     mrnumber = {0440159},
     zbl = {0328.34067},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1975__34_1_115251/}
}