@article{Vyalyi_2015,
    doi = {10.1134/s0032946015040043},
    url = {https://doi.org/10.1134%2Fs0032946015040043},
    year = {2015},
    month = {oct},
    publisher = {Pleiades Publishing Ltd},
    volume = {51},
    number = {4},
    pages = {349--360},
    author = {M. N. Vyalyi and A. A. Rubtsov},
    title = {On regular realizability problems for context-free languages},
    journal = {Problems of Information Transmission}
}

@article{Vyalyi_2015, doi = {10.1134/s0032946015040043}, url = {https://doi.org/10.1134%2Fs0032946015040043}, year = {2015}, month = {oct}, publisher = {Pleiades Publishing Ltd}, volume = {51}, number = {4}, pages = {349--360}, author = {M. N. Vyalyi and A. A. Rubtsov}, title = {On regular realizability problems for context-free languages}, journal = {Problems of Information Transmission} }