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Distance-regular digraphs of girth 4. (English) Zbl 0642.05024
The authors show that two one-parameter families contain all possible parameters for distance-regular digraphs of girth 4 and they construct a new example of such a graph with 64 vertices.
Reviewer: J.W.Moon

MSC:
05C20 Directed graphs (digraphs), tournaments
05C35 Extremal problems in graph theory
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