@article{M2AN_2020__54_1_181_0,
     author = {Feppon, Florian and Allaire, Gr\'egoire and Dapogny, Charles},
     title = {A variational formulation for computing shape derivatives of geometric constraints along rays},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {181--228},
     publisher = {EDP-Sciences},
     volume = {54},
     number = {1},
     year = {2020},
     doi = {10.1051/m2an/2019056},
     mrnumber = {4055458},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/m2an/2019056/}
}