@article{PismaZhETF.49.268,
    title = {Tunneling microscopy of a cleaved $YBa_2Cu_3O_{7-\delta}$ single crystal at 4.2 K},
    author = {Pryadkin, S. L. and Tsoi, V. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {49},
    issue = {5},
    pages = {268},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16897.shtml},
}