@article{JMAG_2009_5_3_a0,
     author = {O. Bershtein and S. Sinel'shchikov},
     title = {A $q$-analog of the {Hua} equations},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {219--244},
     year = {2009},
     volume = {5},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2009_5_3_a0/}
}