@article{PismaZhETF.88.643,
    title = {The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime},
    author = {Kachelrie, M. and Parizot, E. and Semikoz, D. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {88},
    issue = {9},
    pages = {643},
    year = {2008},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_28275.shtml},
}