@article{Seidl_1999,
    doi = {10.1051/ita:1999101},
    url = {https://doi.org/10.1051%2Fita%3A1999101},
    year = {1999},
    month = {jul},
    publisher = {{EDP} Sciences},
    volume = {33},
    number = {4-5},
    pages = {427--446},
    author = {Helmut Seidl and Damian Niwi{\'{n}}ski},
    title = {On Distributive Fixed-Point Expressions},
    journal = {{RAIRO} - Theoretical Informatics and Applications}
}

@article{Seidl_1999, doi = {10.1051/ita:1999101}, url = {https://doi.org/10.1051%2Fita%3A1999101}, year = {1999}, month = {jul}, publisher = {{EDP} Sciences}, volume = {33}, number = {4-5}, pages = {427--446}, author = {Helmut Seidl and Damian Niwi{\'{n}}ski}, title = {On Distributive Fixed-Point Expressions}, journal = {{RAIRO} - Theoretical Informatics and Applications} }