@article{EP_2015_49_a0,
     author = {Samira EL Yacoubi},
     title = {Preface},
     journal = {ESAIM. Proceedings},
     pages = {I--II},
     year = {2015},
     volume = {49},
     doi = {10.1051/proc/20154900f1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/proc/20154900f1/}
}