@article{Rosenlicht_1981,
    doi = {10.2307/2374255},
    url = {https://doi.org/10.2307%2F2374255},
    year = {1981},
    month = {oct},
    publisher = {{JSTOR}},
    volume = {103},
    number = {5},
    pages = {977},
    author = {Maxwell Rosenlicht},
    title = {On the Value Group of a Differential Valuation {II}},
    journal = {American Journal of Mathematics}
}

@article{Rosenlicht_1981, doi = {10.2307/2374255}, url = {https://doi.org/10.2307%2F2374255}, year = {1981}, month = {oct}, publisher = {{JSTOR}}, volume = {103}, number = {5}, pages = {977}, author = {Maxwell Rosenlicht}, title = {On the Value Group of a Differential Valuation {II}}, journal = {American Journal of Mathematics} }