# Bulletin of the ICA

## Volume 56, May, 2009

** News**
** Annual General Meeting**
** Euler, Hall, and Kirkman Medals**
** Bulletin Policy**
** Announcements**
** Joan Gimbert, Nacho Lopez, Mirka Miller and Joseph Ryan**, "On the period and tail of sequences of iterated eccentric digraphs", pp. 19-32
** Qingde Kang, Huixian Jia and Xiaoshan Liu**, "Packings and coverings for four graphs with six vertices and nine edges (λ > 1)", pp. 33-50
** Anthony J. Macula, Daniel J. Marcus and Jordan S. Rogers**, "Erdos-Renyi Like Uniform Vaccination Bound for a Small-World Network", pp. 51-61
** Zenghua Ma, Yanxun Chang and Tao Feng**, "The spectrum for strictly pairwise distinct triple systems", pp. 62-72
** Michael J. Ferrara, Ronald J. Gould and John R. Schmitt**, "Using Edge Exchanges To Prove The Erdos-Jacobson-Lehel Conjecture", pp. 73-80
** Kevin Ventullo and Abdollah Khodkar**, "A three dimensional silver cube of order seven", pp. 81-84
** Anthony B. Evans, Darren A. Narayan and James Urick**, "Representations of graphs modulo n: some problems", pp. 85-97
** Mehdi Behzad, Pooya Hatami and E.S. Mahmoodian**, "Minimum vertex covers in the Generalized Petersen Graphs P(n,2)", pp. 98-102
** S. Ramachandran and S. Monikandan**, "Graph Reconstruction Conjecture: Reductions Using Complement, Connectivity and Distance ", pp. 103-108
** Recent Conferences**