@article{PismaZhETF.72.115,
    title = {Exact singlet bond ground states for electronic models},
    author = {Dmitriev, D. V. and Krivnov, V. Ya. and Ovchinnikov, A. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {72},
    issue = {2},
    pages = {115},
    year = {2000},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_13696.shtml},
}