@article{JRAM_1975__272_151521,
     author = {A.L. Shields and L.A. Rubel},
     title = {Invariant subspaces of {L...} and {H...} .},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {32--44},
     publisher = {mathdoc},
     volume = {272},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1975__272_151521/}
}