@article{KYB_1994_30_4_a7,
     author = {Ramayyan, A.},
     title = {On $n$th order differential equations over {Hardy} fields},
     journal = {Kybernetika},
     pages = {461--470},
     year = {1994},
     volume = {30},
     number = {4},
     mrnumber = {1303296},
     zbl = {0822.34033},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1994_30_4_a7/}
}