@article{CTGDC_2001__42_4_261_0,
     author = {Klaus, Stephan},
     title = {Cochain operations and higher cohomology operations},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {261--284},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {42},
     number = {4},
     year = {2001},
     mrnumber = {1876867},
     zbl = {1003.55005},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_2001__42_4_261_0/}
}