@article{701182,
     title = {On minimal points with respect to a set in Banach spaces},
     booktitle = {Abstracta. 8th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1980},
     pages = {82-85},
     url = {http://dml.mathdoc.fr/item/701182}
}

Godini, G. On minimal points with respect to a set in Banach spaces, dans Abstracta. 8th Winter School on Abstract Analysis, GDML_Books,  (1980), pp. 82-85. http://gdmltest.u-ga.fr/item/701182/