@article{PismaZhETF.51.103,
    title = {Temperature and angular dependences of the lower critical field in twinless $TmBa_2Cu_3O_{7-\delta}$ single crystals},
    author = {Zhukov, A. A. and Moshchalkov, V. V. and Krzhizhanovskii, I. G. and Petrenko, O. V. and Rybachuk, V. A. and Voronkova, V. I. and Yanovskii, V. K.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {51},
    issue = {2},
    pages = {103},
    year = {1990},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17198.shtml},
}