@article{CRMATH_2018__356_2_141_0,
     author = {Lacoste, Cyril},
     title = {On the difficulty of finding spines},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {141--145},
     publisher = {Elsevier},
     volume = {356},
     number = {2},
     year = {2018},
     doi = {10.1016/j.crma.2018.01.007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1016/j.crma.2018.01.007/}
}