@article{MZ_1996__223_3_174926,
     author = {Mingliang Cai and G.J. Galloway},
     title = {Least area {Tori} and 3-manifolds of nonnegative scalar curvature.},
     journal = {Mathematische Zeitschrift},
     pages = {387--396},
     publisher = {mathdoc},
     volume = {223},
     number = {3},
     year = {1996},
     zbl = {0869.53035},
     url = {http://geodesic.mathdoc.fr/item/MZ_1996__223_3_174926/}
}