@article{PismaZhETF.69.395,
    title = {Classification of singular points in polarization field of cosmic microwave background and eigenvectors of Stokes matrix},
    author = {Dolgov, A. D. and Doroshkevich, A. G. and Novikov~D., I. and Novikov, I. D.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {69},
    issue = {6},
    pages = {395},
    year = {1999},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_14177.shtml},
}