@article{PismaZhETF.41.391,
    title = {Observation of a gap in the spin-wave spectrum in $YFeO_3$ upon an orientational transition in a magnetic field},
    author = {Balbashov, A. M. and Berezin, A. G. and Gufan, Yu. M. and Kolyadko, G. S. and Marchukov, P. Yu. and Nikolaev, I. V. and Rudashevskii, E. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {41},
    issue = {9},
    pages = {391},
    year = {1985},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_22376.shtml},
}