@article{GDZPPN002323346, title = {Interaction of Tubes and Spheres.}, journal = {Mathematische Annalen}, volume = {264}, year = {1983}, pages = {31-42}, zbl = {0491.53034}, url = {http://dml.mathdoc.fr/item/GDZPPN002323346} }
Vanhecke, L.; Willmore, T.J. Interaction of Tubes and Spheres.. Mathematische Annalen, Tome 264 (1983) pp. 31-42. http://gdmltest.u-ga.fr/item/GDZPPN002323346/