@article{AM2_1993__46_2-3_137538,
     author = {Frantisek Neuman},
     title = {On the n-th order iterative ordinary linear differential equations.},
     journal = {Aequationes mathematicae},
     pages = {38--43},
     publisher = {mathdoc},
     volume = {46},
     number = {2-3},
     year = {1993},
     zbl = {0791.34012},
     url = {http://geodesic.mathdoc.fr/item/AM2_1993__46_2-3_137538/}
}