TY  - JOUR
AU  - Campbell, Daniel
AU  - Hencl, Stanislav
TI  - Approximation of planar Sobolev W2,1 homeomorphisms by piecewise quadratic homeomorphisms and diffeomorphisms
JO  - ESAIM: Control, Optimisation and Calculus of Variations
PY  - 2021
VL  - 27
PB  - EDP-Sciences
UR  - https://www.numdam.org/articles/10.1051/cocv/2021019/
DO  - 10.1051/cocv/2021019
LA  - en
ID  - COCV_2021__27_1_A28_0
ER  -