@article{GDZPPN002042401,
title = {A modulus of smoothness based on an algebraic addition.},
journal = {Aequationes mathematicae},
volume = {53},
year = {1997},
pages = {56-73},
zbl = {0882.41008},
url = {http://dml.mathdoc.fr/item/GDZPPN002042401}
}
Felten, M. A modulus of smoothness based on an algebraic addition.. Aequationes mathematicae, Tome 53 (1997) pp. 56-73. http://gdmltest.u-ga.fr/item/GDZPPN002042401/