@article{10_4153_CMB_1998_031_0,
     author = {Shackell, John},
     title = {On a {Problem} of {Rubel} {Concerning} the {Set} of {Functions} {Satisfying} {All} the {Algebraic} {Differential} {Equations} {Satisfied} by a {Given} {Function}},
     journal = {Canadian mathematical bulletin},
     pages = {214--224},
     year = {1998},
     volume = {41},
     number = {2},
     doi = {10.4153/CMB-1998-031-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1998-031-0/}
}