Geometric Determination of the Spheres Which Are Tangent to Four Given Ones.

Eugenio Roanes-Macías Eugenio Roanes-Lozano Geometric Determination of the Spheres Which Are Tangent to Four Given Ones. 52-61 2002 conf/iccS/2002-2 International Conference on Computational Science (2) http://link.springer.de/link/service/series/0558/bibs/2330/23300052.htm db/conf/iccS/iccS2002-2.html#Roanes-MaciasR02