@article{Singer_1990,
    title = {Formal solutions of differential equations},
    volume = {10},
    issn = {0747-7171},
    url = {http://dx.doi.org/10.1016/S0747-7171(08)80037-5},
    doi = {10.1016/s0747-7171(08)80037-5},
    number = {1},
    journal = {Journal of Symbolic Computation},
    publisher = {Elsevier BV},
    author = {Singer, Michael. F},
    year = {1990},
    month = {jul},
    pages = {59--94},
    date-added = {2024-1-20 9:2:38 +0100}
}

@article{Singer_1990, title = {Formal solutions of differential equations}, volume = {10}, issn = {0747-7171}, url = {http://dx.doi.org/10.1016/S0747-7171(08)80037-5}, doi = {10.1016/s0747-7171(08)80037-5}, number = {1}, journal = {Journal of Symbolic Computation}, publisher = {Elsevier BV}, author = {Singer, Michael. F}, year = {1990}, month = {jul}, pages = {59--94}, date-added = {2024-1-20 9:2:38 +0100} }