@article{GT_2014_18_2_a0,
     author = {Panov, Dmitri and Petrunin, Anton},
     title = {Sweeping out sectional curvature},
     journal = {Geometry & topology},
     pages = {617--631},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2014},
     doi = {10.2140/gt.2014.18.617},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2014.18.617/}
}