@article{10_2140_agt_2014_14_1,
     author = {Bellier, Olivia},
     title = {Koszul duality theory for operads over {Hopf} algebras},
     journal = {Algebraic and Geometric Topology},
     pages = {1--35},
     year = {2014},
     volume = {14},
     number = {1},
     doi = {10.2140/agt.2014.14.1},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.1/}
}