@article{10_1090_S0894_0347_97_00228_2,
     author = {Deninger, Christopher},
     title = {Deligne periods of mixed motives, {\dh}{\textthreequarters}-theory and the entropy of certain \^a„{\textcurrency}\^a{\textquestiondown}-actions},
     journal = {Journal of the American Mathematical Society},
     pages = {259--281},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1997},
     doi = {10.1090/S0894-0347-97-00228-2},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-97-00228-2/}
}