@incollection {jue:96c,
 author = {B. J{\"u}ttler},
 title = {Construction of Surfaces by Shape Preserving Approximation of Contour Data},
 booktitle = {Advanced Course on FAIR\-SHAPE (J. Hoschek and P. Kaklis, eds.)},
 pages = {217--228},
 publisher = {Teubner},
 address = {Stuttgart},
 year = {1996}
}