@article{PismaZhETF.33.295,
    title = {Observation of a two-step Glauber process in a double charge exchange of $\pi^+$ mesons by nuclei},
    author = {Vorob'ev, I. I. and Novikov, L. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {33},
    issue = {5},
    pages = {295},
    year = {1981},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23011.shtml},
}