@article{10_4064_cm_63_1_89_105,
     author = {Jacek \'Swi\k{a}tkowski},
     title = {Compact 3-manifolds with a flat {Carnot-Carath\'eodory} metric},
     journal = {Colloquium Mathematicum},
     pages = {89--105},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1992},
     doi = {10.4064/cm-63-1-89-105},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-63-1-89-105/}
}