@article{MM2_1992__74_2_155695,
     author = {Uwe Kaiser},
     title = {Strong {Band} sum and dichromatic invariants.},
     journal = {Manuscripta mathematica},
     pages = {237--252},
     publisher = {mathdoc},
     volume = {74},
     number = {2},
     year = {1992},
     zbl = {0751.57003},
     url = {http://geodesic.mathdoc.fr/item/MM2_1992__74_2_155695/}
}