@article{CLTM_1997_1997_1_a6,
     author = {Deninger, Christopher},
     title = {Sobre las extensiones de motivos mezclados.},
     journal = {Collectanea mathematica},
     pages = {97-113},
     publisher = {mathdoc},
     volume = {48},
     number = {1-2},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_1997_1997_1_a6/}
}