@article{PismaZhETF.49.226,
    title = {Density of quasicrystals},
    author = {Kalugin, P. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {49},
    issue = {4},
    pages = {226},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16884.shtml},
}