@article{PismaZhETF.58.321,
    title = {Superconformal string amplitudes for $\pi$-meson interactions},
    author = {Kudryavtsev, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {58},
    issue = {5},
    pages = {321},
    year = {1993},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17925.shtml},
}