@article{Rosenlicht_1979,
    doi = {10.2307/2373949},
    url = {https://doi.org/10.2307%2F2373949},
    year = {1979},
    month = {feb},
    publisher = {{JSTOR}},
    volume = {101},
    number = {1},
    pages = {258},
    author = {Maxwell Rosenlicht},
    title = {On the Value Group of a Differential Valuation},
    journal = {American Journal of Mathematics}
}

@article{Rosenlicht_1979, doi = {10.2307/2373949}, url = {https://doi.org/10.2307%2F2373949}, year = {1979}, month = {feb}, publisher = {{JSTOR}}, volume = {101}, number = {1}, pages = {258}, author = {Maxwell Rosenlicht}, title = {On the Value Group of a Differential Valuation}, journal = {American Journal of Mathematics} }