@article{CMA_2015_96_a6,
     author = {P. N. Brusov and T. V. Filatova},
     title = {How to distinguish a mixture of two $d$-wave states from a pure $d$-wave state of high-temperature superconductors},
     journal = {Contemporary Mathematics and Its Applications},
     pages = {102--111},
     publisher = {mathdoc},
     volume = {96},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMA_2015_96_a6/}
}