@article{JOLT_2022_32_3_a4,
     author = {R. Brown and S. Marsland and R. McLachlan},
     title = {Differential {Invariant} {Signatures} for {Planar} {Lie} {Group} {Transformations} with {Application} to {Images}},
     journal = {Journal of Lie Theory},
     pages = {709--736},
     year = {2022},
     volume = {32},
     number = {3},
     doi = {10.5802/jolt.1248},
     zbl = {1502.53020},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.1248/}
}