@article{SF_1993__46_1_135241,
     author = {L. Autret},
     title = {Entire vectors and time reversible {Cauchy} problems.},
     journal = {Semigroup forum},
     pages = {347--351},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1993},
     zbl = {0809.47041},
     url = {http://geodesic.mathdoc.fr/item/SF_1993__46_1_135241/}
}