@article{Joshi_1975,
    doi = {10.1016/s0022-0000(75)80019-5},
    url = {https://doi.org/10.1016%2Fs0022-0000%2875%2980019-5},
    year = {1975},
    month = {feb},
    publisher = {Elsevier {BV}},
    volume = {10},
    number = {1},
    pages = {136--163},
    author = {Aravind K. Joshi and Leon S. Levy and Masako Takahashi},
    title = {Tree adjunct grammars},
    journal = {Journal of Computer and System Sciences}
}

@article{Joshi_1975, doi = {10.1016/s0022-0000(75)80019-5}, url = {https://doi.org/10.1016%2Fs0022-0000%2875%2980019-5}, year = {1975}, month = {feb}, publisher = {Elsevier {BV}}, volume = {10}, number = {1}, pages = {136--163}, author = {Aravind K. Joshi and Leon S. Levy and Masako Takahashi}, title = {Tree adjunct grammars}, journal = {Journal of Computer and System Sciences} }