1,2,3 = 2,3,4: A solution to the problem of the homology of the digits in the avian hand by Günter P. Wagner and Jacques A. Gauthier (source code)

= 1,2,3 = 2,3,4: A solution to the problem of the homology of the digits in the avian hand by Günter P. Wagner and Jacques A. Gauthier
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{tag=Work by Günter P. Wagner}
{tag=Work by Jacques A. Gauthier}
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By <Günter P. Wagner> and <Jacques A. Gauthier>. Proceedings of the National Academy of Sciences 96, 5111–5116.

https://doi.org/10.1073/pnas.96.9.5111

https://pmc.ncbi.nlm.nih.gov/articles/PMC21825/