@article{IM_1988__94_2_143623,
     author = {Robert E. Gompf},
     title = {On sums of algebraic surfaces.},
     journal = {Inventiones mathematicae},
     pages = {171--174},
     publisher = {mathdoc},
     volume = {94},
     number = {2},
     year = {1988},
     zbl = {0659.57008},
     url = {http://geodesic.mathdoc.fr/item/IM_1988__94_2_143623/}
}