@article{hs-pssaa-98 
, author =  "Dan Halperin and Christian R. Shelton" 
, title =   "A perturbation scheme for spherical arrangements with application to molecular modeling" 
, journal = "Comput. Geom. Theory Appl." 
, volume =  10 
, year =    1998 
, pages =   "273--287" 
, succeeds =    "hs-pssaa-97" 
, update =  "98.11 devillers" 
}