@article{JOLT_2016_26_1_a12,
     author = {P. J. Olver},
     title = {The {Symmetry} {Groupoid} and {Weighted} {Signature} of a {Geometric} {Object}},
     journal = {Journal of Lie Theory},
     pages = {235--267},
     year = {2016},
     volume = {26},
     number = {1},
     doi = {10.5802/jolt.890},
     zbl = {1341.53027},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.890/}
}