@article{PismaZhETF.76.846,
    title = {A new class of nodal stationary states in 2D Heisenberg ferromagnet},
    author = {Bostrem, I. G. and Ovchinnikov, A. S.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {76},
    issue = {12},
    pages = {846},
    year = {2002},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_9521.shtml},
}