@article{701118,
     title = {Extremal preimage measures and measurable weak sections},
     booktitle = {Abstracta. 6th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1978},
     pages = {37-44},
     url = {http://dml.mathdoc.fr/item/701118}
}

Graf, Siegfried. Extremal preimage measures and measurable weak sections, dans Abstracta. 6th Winter School on Abstract Analysis, GDML_Books,  (1978), pp. 37-44. http://gdmltest.u-ga.fr/item/701118/