@article{GT_2023_27_9_a4,
     author = {Crowley, Diarmuid and Schick, Thomas and Steimle, Wolfgang},
     title = {The derivative map for diffeomorphism of disks: an example},
     journal = {Geometry & topology},
     pages = {3699--3713},
     publisher = {mathdoc},
     volume = {27},
     number = {9},
     year = {2023},
     doi = {10.2140/gt.2023.27.3699},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2023.27.3699/}
}