@article{10_4153_CMB_1967_017_2,
     author = {Datko, R.},
     title = {Integrals of the {Differential} {Equations} ẍ + f ( s ) x = 0},
     journal = {Canadian mathematical bulletin},
     pages = {191--196},
     year = {1967},
     volume = {10},
     number = {2},
     doi = {10.4153/CMB-1967-017-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1967-017-2/}
}