TY  - JOUR
AU  - Rumen K. Uluchev
TI  - B-Splines with Birkhoff Knots. Applications in the Approximations and Shape-Preserving Interpolation
JO  - Mathematica balkanica
PY  - 1989
SP  - 225
VL  - 3
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MABA_1989_3_2_a10/
ID  - MABA_1989_3_2_a10
ER  -