@article{JEMS_2007_9_2_a5,
     author = {Pietro Donatini and Patrizio Frosini},
     title = {Natural pseudodistances between closed surfaces},
     journal = {Journal of the European Mathematical Society},
     pages = {331--353},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2007},
     doi = {10.4171/jems/82},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/82/}
}