In this article we give an introduction to mixed motives and sketch a couple of ways to construct examples.
@article{urn:eudml:doc:40429, title = {On extensions of mixed motives.}, journal = {Collectanea Mathematica}, volume = {48}, year = {1997}, pages = {97-113}, zbl = {0890.14001}, mrnumber = {MR1464019}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:40429} }
Deninger, Christopher. On extensions of mixed motives.. Collectanea Mathematica, Tome 48 (1997) pp. 97-113. http://gdmltest.u-ga.fr/item/urn:eudml:doc:40429/