@article{HHA_2015_17_2_a14,
     author = {Keiichi Sakai},
     title = {Lin{\textendash}Wang type formula for the {Haefliger} invariant},
     journal = {Homology, homotopy, and applications},
     pages = {317--341},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2015},
     doi = {10.4310/HHA.2015.v17.n2.a15},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4310/HHA.2015.v17.n2.a15/}
}