@article{CM_1987__63_1_99_0,
     author = {Breen, L.},
     title = {Biextensions altern\'ees},
     journal = {Compositio Mathematica},
     pages = {99--122},
     publisher = {Martinus Nijhoff Publishers},
     volume = {63},
     number = {1},
     year = {1987},
     mrnumber = {906381},
     zbl = {0632.14036},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1987__63_1_99_0/}
}