@article{10_4171_dm_740,
     author = {Katsuhiko Kuribayashi},
     title = {On the {Whistle} {Cobordism} {Operation} in {String} {Topology} of {Classifying} {Spaces}},
     journal = {Documenta mathematica},
     pages = {125--142},
     year = {2020},
     volume = {25},
     doi = {10.4171/dm/740},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/740/}
}