@article{BUMI_2000_8_3B_3_a12,
     author = {Gregori, Valent{\'\i}n and Romaguera, Salvador},
     title = {Approximate quantities, hyperspaces and metric completeness},
     journal = {Bollettino della Unione matematica italiana},
     pages = {751--755},
     publisher = {mathdoc},
     volume = {Ser. 8, 3B},
     number = {3},
     year = {2000},
     zbl = {0985.54008},
     mrnumber = {868355},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2000_8_3B_3_a12/}
}