@article{SJL_1974-1975___3_A6_0,
     author = {Crumeyrolle, A.},
     title = {Rev\^etements {\guillemotleft} spinoriels {\guillemotright} du groupe symplectique et indices de {Maslov}},
     journal = {S\'eminaire Jean Leray},
     note = {talk:5},
     pages = {1--7},
     publisher = {Coll\`ege de France},
     number = {3},
     year = {1974-1975},
     language = {fr},
     url = {http://www.numdam.org/item/SJL_1974-1975___3_A6_0/}
}