@article{GDZPPN002232820, title = {Strong Band sum and dichromatic invariants.}, journal = {Manuscripta mathematica}, volume = {76}, year = {1992}, pages = {237-252}, zbl = {0751.57003}, url = {http://dml.mathdoc.fr/item/GDZPPN002232820} }
Kaiser, Uwe. Strong Band sum and dichromatic invariants.. Manuscripta mathematica, Tome 76 (1992) pp. 237-252. http://gdmltest.u-ga.fr/item/GDZPPN002232820/