@article{MABA_1991_5_2_a7,
     author = {Fioravante Patrone and Julian Revalski},
     title = {Characterizations of {Tikhonov} {Well-Posedness} for {Preorders}},
     journal = {Mathematica balkanica},
     pages = {146},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/MABA_1991_5_2_a7/}
}