@article{MZ_1991__208_3_174307,
     author = {Sicheng Wang},
     title = {The existence of maps of nonzero degree between aspherical 3-manifolds.},
     journal = {Mathematische Zeitschrift},
     pages = {147--160},
     publisher = {mathdoc},
     volume = {208},
     number = {3},
     year = {1991},
     zbl = {0737.57006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174307/}
}