@article{EP_2020_68_a0, author = {Pierre Calka and Herv\'e Cardot}, title = {Foreword}, journal = {ESAIM. Proceedings}, pages = {I--I}, publisher = {mathdoc}, volume = {68}, year = {2020}, doi = {10.1051/proc/202068000}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.1051/proc/202068000/} }