@article{JLT_2003_13_1_JLT_2003_13_1_a9,
     author = {C. Muriel and J. L. Romero },
     title = {C {\protect\textsuperscript{infinity}-Symmetries} and {Reduction} of {Equations} {Without} {Lie} {Point} {Symmetries}},
     journal = {Journal of Lie theory},
     pages = {167--188},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/JLT_2003_13_1_JLT_2003_13_1_a9/}
}