Harary, Frank; Norman, R. Z.; Cartwright, D. Structural models: An introduction to the theory of directed graphs. (English) Zbl 0139.41503 New York-London-Sydney: John Wiley and Sons, Inc. IX, 415 p. (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 245 Documents Keywords:topology PDF BibTeX XML OpenURL