@article{CRMATH_2014__352_11_881_0,
     author = {Willwacher, Thomas},
     title = {The obstruction to the existence of a loopless star product},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {881--883},
     publisher = {Elsevier},
     volume = {352},
     number = {11},
     year = {2014},
     doi = {10.1016/j.crma.2014.09.018},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2014.09.018/}
}