An extremal problem for some classes of oriented graphs

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An extremal problem for some classes of oriented graphs. (English). Časopis pro pěstování matematiky, vol. 108 (1983), issue 1, pp. 53-69

References:

[1] K. Howalla A. N. Dabboucy R. Tout: On the maximum number of arcs in some classes of graphs. Čas. pěst. mat. 107 (1982), 388-392. MR 0683819

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