@article{PismaZhETF.6.774,
    title = {Upper Limit of Elementary Length},
    author = {Kirzhnits, D. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {6},
    issue = {7},
    pages = {774},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25486.shtml},
}