@article{MABA_1992_6_3_a8,
     author = {Konstantin Stathakopoulos},
     title = {A {Contribution} to the {Notation} of {Convexity.} {I} (in {German)}},
     journal = {Mathematica balkanica},
     pages = {257},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/MABA_1992_6_3_a8/}
}