@article{BAR_HILLEL_1961,
    doi = {10.1524/stuf.1961.14.14.143},
    url = {https://doi.org/10.1524%2Fstuf.1961.14.14.143},
    year = {1961},
    month = {jan},
    publisher = {Walter de Gruyter {GmbH}},
    volume = {14},
    number = {1-4},
    author = {Y. BAR-HILLEL and M. PERLES and E. SHAMIR},
    title = {On formai properties o{\^{\i}} simple phreise structure grammars},
    journal = {{STUF} - Language Typology and Universals}
}

@article{BAR_HILLEL_1961, doi = {10.1524/stuf.1961.14.14.143}, url = {https://doi.org/10.1524%2Fstuf.1961.14.14.143}, year = {1961}, month = {jan}, publisher = {Walter de Gruyter {GmbH}}, volume = {14}, number = {1-4}, author = {Y. BAR-HILLEL and M. PERLES and E. SHAMIR}, title = {On formai properties o{\^{\i}} simple phreise structure grammars}, journal = {{STUF} - Language Typology and Universals} }