Gabriele Di Stefano, Pietro Montanari, Alfredo Navarra. About Ungatherability of Oblivious and Asynchronous Robots on Anonymous Rings. In Zsuzsanna Lipták, William F. Smyth, editors, Combinatorial Algorithms - 26th International Workshop, IWOCA 2015, Verona, Italy, October 5-7, 2015, Revised Selected Papers. Volume 9538 of Lecture Notes in Computer Science, pages 136-147, Springer, 2015. [doi]
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