@article{Pillwein_2015,
    doi = {10.1145/2850449.2850458},
    url = {https://doi.org/10.1145%2F2850449.2850458},
    year = {2015},
    month = {nov},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {49},
    number = {3},
    pages = {90--93},
    author = {Veronika Pillwein and Miriam Schussler},
    title = {An efficient procedure deciding positivity for a class of holonomic functions},
    journal = {{ACM} Communications in Computer Algebra}
}

@article{Pillwein_2015, doi = {10.1145/2850449.2850458}, url = {https://doi.org/10.1145%2F2850449.2850458}, year = {2015}, month = {nov}, publisher = {Association for Computing Machinery ({ACM})}, volume = {49}, number = {3}, pages = {90--93}, author = {Veronika Pillwein and Miriam Schussler}, title = {An efficient procedure deciding positivity for a class of holonomic functions}, journal = {{ACM} Communications in Computer Algebra} }