@article{gs-epsee-98
, author =	"B. G{\"a}rtner and S. Sch{\"o}nherr"
, title =	"Exact Primitives for Smallest Enclosing Ellipses"
, journal =	"Information Processing Letters"
, volume =	"68"
, year =	"1998"
, pages =	"33--38"
}