@article{PismaZhETF.43.573,
    title = {Optimum current density profile in a tokamak},
    author = {Esipchuk, Yu. V. and Kadomtsev, B. B.},
    journal = {Письма в ЖЭТФ},
    volume = {43},
    issue = {12},
    pages = {573},
    year = {1986},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_21507.shtml},
}