**Ars Combinatoria **

**Volume LII, May, 1999 **

**Margit Voigt **"Colouring of distance graphs"

**Yoshimi Egawa and Masahiko Miyamoto **"Graph Labelings in Boolean Lattices"

**Mark Ramras **"Regular Subgraphs of Hypercubes"

**Mary M. Miller, Robert C. Brigham and Ronald D. Dutton **"An Equation Involving the Neighborhood (Two-Step) and Line Graphs"

**Patric R.J. Ostergard **"New Constructions for q-ary Covering Codes"

**Elizabeth J. Billington and Darryn E. Bryant **"The possible number of cycles in cycle systems"

**M.J. Grannell, T.S. Griggs, K.A.S. Quinn and R.G. Stanton **"A census of minimum pair-coverings with restricted largest block length"

**Mariagrazia Bianchi, Anna Gillio and Libero Verardi **"Counting Squares of n-Subsets in Finite Groups"

**Yair Caro and Raphael Yuster **"Graphs Having the Local Decomposition Property"

**Klaus Dohmen **"On Partial Sums of Chromatic Polynomials"

**J.E. Dunbar, J.H. Hattingh, R.C. Laskar and L.R. Markus **"Domination Using Induced Cliques in Graphs"

**Yunsun Nam **"Integral Matrices with Given Row and Column Sums "

**J.D. Key and F.E. Sullivan **"Steiner Systems From Binary Codes"

**Anthony J. Macula **"An Analysis of the Lines in the Three Dimensional Affine Space Over F3"

**Marty J. Wolf and David J. Haglin **"An Optimal Algorithm for Finding All Convex Subsets in Tournaments"

**J. Ghoshal, R. Laskar and D. Pillone **"Further Results on Minimal Rankings"

**G.B. Khosrovshahi and H.R. Maima **"On 2-(v,3) Steiner Trades of Small Volumes"

**S. Arumugam and S. Velammal **"Maximum Size of a Connected Graph with Given Domination Parameters"

**Y.S. Liaw **"More Z-Cyclic Room Squares"

**Zhi-Hong Chen, Kuang Ying-Qiang and Hong-Jian Lai **"Connectivity of cycle matroids and bicircular matroids"

**Marina Martinova **"An Isomorphic Decomposition of K24"

**S. Mishra **"Some New Characterizations of Matroids"

**Joel Puech **"Stability, domination, and irredundance in WAR graphs"

**Katja Valentin **"Polychrome labelings of trees and cycle"

**Bolian Liu and Zhou Bo **"A Generalization of Maximal k-Multiple-Free Sets of Integers"

**Kathleen A.S. Quinn **"Difference Matrices and Orthomorphisms over Non-Abelian Groups"

**Noga Alon and Eldar Fischer **"Refining the Graph Density Condition for the Existence of Almost K-factors"

**Uri Blass and Simon Litsyn **"The smallest covering code of length 8 and radius 2 has 12 words"

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