Matthias Humet, Marc Van Barel. When is the Uvarov transformation positive definite?. Numerical Algorithms, 59(1):51-62, 2012. [doi]
@article{HumetB12,
title = {When is the Uvarov transformation positive definite?},
author = {Matthias Humet and Marc Van Barel},
year = {2012},
doi = {10.1007/s11075-011-9475-4},
url = {http://dx.doi.org/10.1007/s11075-011-9475-4},
researchr = {https://researchr.org/publication/HumetB12},
cites = {0},
citedby = {0},
journal = {Numerical Algorithms},
volume = {59},
number = {1},
pages = {51-62},
}