@article{PismaZhETF.5.48,
    title = {Complexes of Several Spins in a Linear Heisenberg Chain},
    author = {Ovchinnikov, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {5},
    issue = {2},
    pages = {48},
    year = {1967},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_25093.shtml},
}