@article{PismaZhETF.49.83,
    title = {Observation of an anisotropy of the vortex lattice in the basal plane of a $YBa_2Cu_3O_x$ single crystal},
    author = {Vinnikov, L. Ya. and Grigor'eva, I. V. and Gurevich, L. A. and Osip'yan, Yu. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {49},
    issue = {2},
    pages = {83},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16840.shtml},
}