interpolation curves; Lienhard method
This paper deals with the constructions of interpolation curves which pass through given supporting points (nodes) and touch supporting tangent vectors given at only some fo these points or, as the case may be, at all these points. The mathematical kernel of these constructions is based on Lienhard's interpolation method.
 H. Lienhard: Interpolation von Funktionswerten bei numerischen Bahnsteuerungen
. Undated publication of CONTRAVES AG, Zürich. Zbl 0147.35803
 J. Matušů: The Lienhard interpolation method and some of its generalization. (in Czech). Acta Polytechiiica - Práce ČVUT, Prague, 3 (IV, 2), 1978.