@article{PismaZhETF.94.867,
    title = {The  analytical singlet $\boldsymbol{\alpha_s^4}$ QCD contributions into the $\boldsymbol{e^+e^-}$-annihilation Adler function and   the generalized Crewther relations},
    author = {Kataev, A. L.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {94},
    issue = {11},
    pages = {867},
    year = {2011},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_29592.shtml},
}