| On angles formed by $N$ points of the Euclidean and Hyperbolic planes | Geombinatorics |  | | 2008 | 623 | 969 |
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| Collars and partitions of hyperbolic cone-surfaces | Geometriae dedicata |  | | 2007 | 498 | 0 |
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| Minimal length of two intersecting simple closed geodesics | Manuscripta mathematica | | | 2007 | 613 | 1,855 |
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| Hyperbolic polygons and simple closed geodesics | L'Enseignement mathématique | | | 2006 | 552 | 0 |
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