Ciprian Borcea, Xavier Goaoc, Sylvain Lazard, Sylvain Petitjean. Common Tangents to Spheres in R:::3:::. Discrete & Computational Geometry, 35(2):287-300, 2006. [doi]
@article{BorceaGLP06,
title = {Common Tangents to Spheres in R:::3:::},
author = {Ciprian Borcea and Xavier Goaoc and Sylvain Lazard and Sylvain Petitjean},
year = {2006},
doi = {10.1007/s00454-005-1230-y},
url = {http://dx.doi.org/10.1007/s00454-005-1230-y},
researchr = {https://researchr.org/publication/BorceaGLP06},
cites = {0},
citedby = {0},
journal = {Discrete & Computational Geometry},
volume = {35},
number = {2},
pages = {287-300},
}