@article{BAG_1989__29_138444,
     author = {B. Klotzek},
     title = {Verschiedene {Diskretheitsbegriffe} in metrischen {R\"aumen}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {121--130},
     publisher = {mathdoc},
     volume = {29},
     year = {1989},
     url = {http://geodesic.mathdoc.fr/item/BAG_1989__29_138444/}
}