@article{10_4153_CMB_1999_033_0,
     author = {D\u{a}d\u{a}rlat, Marius and Eilers, S{\o}ren},
     title = {The {Bockstein} {Map} is {Necessary}},
     journal = {Canadian mathematical bulletin},
     pages = {274--284},
     year = {1999},
     volume = {42},
     number = {3},
     doi = {10.4153/CMB-1999-033-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1999-033-0/}
}