@article{GDZPPN001186655,
title = {Interpolation by periodic splines with Birkhoff knots.},
journal = {Numerische Mathematik},
volume = {66},
year = {1993},
pages = {63-76},
zbl = {0795.41002},
url = {http://dml.mathdoc.fr/item/GDZPPN001186655}
}
Bojanov, Borislav. Interpolation by periodic splines with Birkhoff knots.. Numerische Mathematik, Tome 66 (1993) pp. 63-76. http://gdmltest.u-ga.fr/item/GDZPPN001186655/