@article{PismaZhETF.49.204,
    title = {Fermion states in an antiferromagnet in connection with a local U/(1) symmetry},
    author = {Balatskii, A. V.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {49},
    issue = {4},
    pages = {204},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16878.shtml},
}