@article {jue:93c,
 author = {B. J{\"u}ttler},
 title = {{Z}ur {K}onstruktion rationaler {K}urven und {F}l\"a{}chen auf {Q}uadriken},
 journal = {J. Geometry},
 volume = {47},
 year = {1993},
 pages = {53--64}
}