@article{HHA_2008_10_2_a5,
     author = {Atabey Kaygun},
     title = {Products in {Hopf-cyclic} cohomology},
     journal = {Homology, homotopy, and applications},
     pages = {115--133},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {2008},
     doi = {10.4310/HHA.2008.v10.n2.a5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4310/HHA.2008.v10.n2.a5/}
}