@article{PismaZhETF.53.466,
    title = {Two pinning mechanisms in single crystals of the $Bi_{2+x}Sr_{2+y}Ca_{1+z}Cu_2O_t$  phase},
    author = {Zhukov, A. A. and Moshchalkov, V. V. and Rybachuk, V. A. and Murashov, V. A. and Goncharov, I. N.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {53},
    issue = {9},
    pages = {466},
    year = {1991},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17627.shtml},
}