Karl R. Abrahamson Andrew Adler Lisa Higham David G. Kirkpatrick Tight Lower Bounds for Probabilistic Solitude Verification on Anonymous Rings. 277-310 1994 41 J. ACM 2 db/journals/jacm/jacm41.html#AbrahamsonAHK94 http://doi.acm.org/10.1145/174652.174656