@article{PORMA_1994__51_4_47266,
     author = {Schmoeger, Christoph},
     title = {On operators of {Saphar} type.},
     journal = {Portugaliae mathematica},
     pages = {617--628},
     publisher = {mathdoc},
     volume = {51},
     number = {4},
     year = {1994},
     zbl = {0823.47003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1994__51_4_47266/}
}