Ulrich Abel. An identity for a general class of approximation operators. Journal of Approximation Theory, 142(1):20-35, 2006. [doi]
@article{Abel06-0,
title = {An identity for a general class of approximation operators},
author = {Ulrich Abel},
year = {2006},
doi = {10.1016/j.jat.2006.03.005},
url = {http://dx.doi.org/10.1016/j.jat.2006.03.005},
researchr = {https://researchr.org/publication/Abel06-0},
cites = {0},
citedby = {0},
journal = {Journal of Approximation Theory},
volume = {142},
number = {1},
pages = {20-35},
}