@article{PM_1992_1992_1_a29,
     author = {Bifet, Emili},
     title = {Cohomolog{\'\i}a, simetr{\'\i}a y perfecci\'on.},
     journal = {Publicacions matem\`atiques},
     pages = {407-420},
     publisher = {mathdoc},
     volume = {36},
     number = {2A},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1992_1992_1_a29/}
}