@article{01433472,
title = {Optimal approximations on Riemannian manifolds.},
journal = {Balkan Journal of Geometry and its Applications (BJGA)},
volume = {4},
year = {1999},
pages = {135-144},
zbl = {0968.58013},
language = {en},
url = {http://dml.mathdoc.fr/item/01433472}
}
Toda, M.; Udrişte, C. Optimal approximations on Riemannian manifolds.. Balkan Journal of Geometry and its Applications (BJGA), Tome 4 (1999) pp. 135-144. http://gdmltest.u-ga.fr/item/01433472/