@article{JRAM_1977__289_151818,
     author = {James J. Kelleher},
     title = {Differentially closed ideals in rings of analytic functions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {55--61},
     publisher = {mathdoc},
     volume = {289},
     year = {1977},
     zbl = {0338.46047},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1977__289_151818/}
}