N. Agmon and D. Peleg, Fault-Tolerant Gathering Algorithms for Autonomous Mobile Robots, SIAM Journal on Computing, vol.36, issue.1, pp.56-82, 2006.
DOI : 10.1137/050645221

H. Ando, Y. Oasa, M. Suzuki, and . Yamashita, Distributed memoryless point convergence algorithm for mobile robots with limited visibility, IEEE Transactions on Robotics and Automation, vol.15, issue.5, pp.818-828, 1999.
DOI : 10.1109/70.795787

P. Chrystal, On the problem to construct the minimum circle enclosing n given points in a plane, the Edinburgh Mathematical Society, Third Meeting, pp.30-1885
DOI : 10.1017/S0013091500037238

M. Cieliebak, . Flocchini, N. Prencipe, and . Santoro, Solving the Robots Gathering Problem, Proceedings of the 30th International Colloquium on Automata, Languages and Programming (ICALP 2003), pp.1181-1196, 2003.
DOI : 10.1007/3-540-45061-0_90

M. Cieliebak, Gathering Non-oblivious Mobile Robots, LATIN, pp.577-588, 2004.
DOI : 10.1007/978-3-540-24698-5_60

X. Defago and A. Konagaya, Circle formation for oblivious anonymous mobile robots with no common sense of orientation, Proceedings of the second ACM international workshop on Principles of mobile computing , POMC '02, pp.97-104, 2002.
DOI : 10.1145/584490.584509

X. Défago and M. Gradinariu, Stéphane Messika, and Philippe Raipin Parvédy. Fault-tolerant and self-stabilizing mobile robots gathering, DISC, pp.46-60, 2006.

Y. Dieudoné and F. Petit, SCATTER OF ROBOTS, Parallel Processing Letters, vol.19, issue.01, pp.175-184, 2009.
DOI : 10.1142/S0129626409000146

S. Dolev, Self Stabilization, Journal of Aerospace Computing, Information, and Communication, vol.1, issue.6, 2000.
DOI : 10.2514/1.10141

URL : https://hal.archives-ouvertes.fr/inria-00627780

P. Flocchini, D. Ilcinkas, A. Pelc, and N. Santoro, Remembering without memory: Tree exploration by asynchronous oblivious robots, SIROCCO, pp.33-47, 2008.
URL : https://hal.archives-ouvertes.fr/hal-00341465

P. Flocchini, E. Kranakis, D. Krizanc, N. Santoro, and C. Sawchuk, Multiple Mobile Agent Rendezvous in a Ring, LATIN 2004: Theoretical Informatics, 6th Latin American Symposium, pp.599-608, 2004.
DOI : 10.1007/978-3-540-24698-5_62

P. Flocchini, G. Prencipe, N. Santoro, and P. Widmayer, Gathering of asynchronous robots with limited visibility, Theoretical Computer Science, vol.337, issue.1-3, pp.147-168, 2005.
DOI : 10.1016/j.tcs.2005.01.001

R. Klasing, E. Markou, and A. Pelc, Gathering asynchronous oblivious mobile robots in a ring, Theoretical Computer Science, vol.390, issue.1, pp.27-39, 2008.
DOI : 10.1016/j.tcs.2007.09.032

URL : https://hal.archives-ouvertes.fr/hal-00307234

G. Prencipe and . Corda, Distributed coordination of a set of autonomous mobile robots, Proceedings of the Fourth European Research Seminar on Advances in Distributed Systems, pp.185-190, 2001.

G. Prencipe, Impossibility of gathering by a set of autonomous mobile robots, Theoretical Computer Science, vol.384, issue.2-3, pp.222-231, 2007.
DOI : 10.1016/j.tcs.2007.04.023

P. Franco, S. J. Preparata, and . Hong, Convex hulls of finite sets of poin ts in two and three dimensions, Commun. ACM, vol.20, issue.2, pp.87-93, 1977.

S. Souissi, X. Défago, and M. Yamashita, Using eventually consistent compasses to gather memory-less mobile robots with limited visibility, ACM Transactions on Autonomous and Adaptive Systems, vol.4, issue.1, pp.1-27, 2009.
DOI : 10.1145/1462187.1462196

I. Suzuki and M. Yamashita, Agreement on a common x-y coordinate system by a group of mobile robots. Intelligent Robots: Sensing, Modeling and Planning, pp.305-321, 1996.

I. Suzuki and M. Yamashita, Distributed Anonymous Mobile Robots: Formation of Geometric Patterns, SIAM Journal on Computing, vol.28, issue.4, pp.1347-1363, 1999.
DOI : 10.1137/S009753979628292X