@article{MAN_1991__289_4_164796,
     author = {Rafael Pay\'a and Angel Rodr{\'\i}guez Palacios},
     title = {Banach spaces which are {semi-L-summands} in their biduals.},
     journal = {Mathematische Annalen},
     pages = {529--542},
     publisher = {mathdoc},
     volume = {289},
     number = {4},
     year = {1991},
     zbl = {0712.46005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164796/}
}