@article{Grigorchuk_1980,
    doi = {10.1007/bf01078416},
    url = {https://doi.org/10.1007%2Fbf01078416},
    year = {1980},
    month = {jan},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {14},
    number = {1},
    pages = {41--43},
    author = {R. I. Grigorchuk},
    title = {Bernside{\textquotesingle}s problem on periodic groups},
    journal = {Functional Analysis and Its Applications}
}

@article{Grigorchuk_1980, doi = {10.1007/bf01078416}, url = {https://doi.org/10.1007%2Fbf01078416}, year = {1980}, month = {jan}, publisher = {Springer Science and Business Media {LLC}}, volume = {14}, number = {1}, pages = {41--43}, author = {R. I. Grigorchuk}, title = {Bernside{\textquotesingle}s problem on periodic groups}, journal = {Functional Analysis and Its Applications} }