@article{MM2_1993__79_1_155837,
     author = {Thomas Peternell and Fr\'ed\'eric Capana},
     title = {4-folds with numerically effective tangent bundles and second {Betti} numbers greater than one.},
     journal = {Manuscripta mathematica},
     pages = {225--238},
     publisher = {mathdoc},
     volume = {79},
     number = {1},
     year = {1993},
     zbl = {0799.14022},
     url = {http://geodesic.mathdoc.fr/item/MM2_1993__79_1_155837/}
}