@article{JOLT_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},
     year = {2003},
     volume = {13},
     number = {1},
     doi = {10.5802/jolt.296},
     zbl = {1058.34046},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.296/}
}