@article{bwmeta1.element.desklight-1be1605c-6d38-4f4c-8d8c-d9987631f905,
author = {I. A. Shevchuk},
title = {On the sharpness of an approximation criterion of smoothness for functions on a segment},
journal = {Banach Center Publications},
volume = {23},
year = {1989},
pages = {401-411},
zbl = {0692.41011},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-1be1605c-6d38-4f4c-8d8c-d9987631f905}
}
I. A. Shevchuk. On the sharpness of an approximation criterion of smoothness for functions on a segment. Banach Center Publications, Tome 23 (1989) pp. 401-411. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-1be1605c-6d38-4f4c-8d8c-d9987631f905/