@article{IM2_2011_75_5_a4,
     author = {Yu. A. Neretin},
     title = {Spectral data for a~pair of matrices of order three and an action of the group $\mathrm{GL}(2,\mathbb Z)$},
     journal = {Izvestiya. Mathematics },
     pages = {959--969},
     publisher = {mathdoc},
     volume = {75},
     number = {5},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2011_75_5_a4/}
}