@article{PismaZhETF.48.345,
    title = {The structure of tetragonal compound $YBa_2Cu_{3-x}O_{6-y}$ in the temperature region 100-1000 K},
    author = {Nifontov, V. P. and Ponomarev, V. I. and Atovmyan, L. O. and Ovanesyan, N. S. and Emel'chenko, G. A. and Tatarchenko, V. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {48},
    issue = {6},
    pages = {345},
    year = {1988},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16732.shtml},
}