@article{Regis_2015,
    doi = {10.1007/s11081-015-9286-x},
    url = {https://doi.org/10.1007%2Fs11081-015-9286-x},
    year = {2015},
    month = {sep},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {17},
    number = {1},
    pages = {229--262},
    author = {Rommel G. Regis},
    title = {On the properties of positive spanning sets and positive bases},
    journal = {Optimization and Engineering}
}

@article{Regis_2015, doi = {10.1007/s11081-015-9286-x}, url = {https://doi.org/10.1007%2Fs11081-015-9286-x}, year = {2015}, month = {sep}, publisher = {Springer Science and Business Media {LLC}}, volume = {17}, number = {1}, pages = {229--262}, author = {Rommel G. Regis}, title = {On the properties of positive spanning sets and positive bases}, journal = {Optimization and Engineering} }