@article{ZNSL_2007_346_a4,
     author = {Kh. D. Ikramov and H. Fassbender},
     title = {Simultaneous reduction to block 
},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {49--62},
     publisher = {mathdoc},
     volume = {346},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2007_346_a4/}
}