@article{ZNSL_2001_280_a19,
     author = {P. V. Svetlov},
     title = {Nonpositively-curved graph manifolds are virtually fibered over the circle},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {272--277},
     publisher = {mathdoc},
     volume = {280},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2001_280_a19/}
}