Hajnal, Péter
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		The Electronic Journal of Combinatorics Volume 8, Issue 1 (2001) - Research Papers
 The Arc-Width of a Graph
 Abstract PDF
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		The Electronic Journal of Combinatorics Volume 21, Issue 2 (2014) - Papers
 A Bijective Proof of Shapiro's Catalan Convolution
 Abstract PDF source files Official source
