Dany Leviatan, A. V. Prymak. On 3-monotone approximation by piecewise polynomials. Journal of Approximation Theory, 133(2):147-172, 2005. [doi]
@article{LeviatanP05,
title = {On 3-monotone approximation by piecewise polynomials},
author = {Dany Leviatan and A. V. Prymak},
year = {2005},
doi = {10.1016/j.jat.2004.01.012},
url = {http://dx.doi.org/10.1016/j.jat.2004.01.012},
researchr = {https://researchr.org/publication/LeviatanP05},
cites = {0},
citedby = {0},
journal = {Journal of Approximation Theory},
volume = {133},
number = {2},
pages = {147-172},
}