BOOLE, G. (1952). Studies in logic and probability. London: Watts .
2.
BUSH, R. R. & MOSTELLER, F. (1955). Stochastic models for learning. New York: Wiley .
3.
CARTWRIGHT, D. (1959). The potential contribution of graph theory to organization theory. In M. Haire (Ed.), Modern organization theory. New York: Wiley .
4.
CARTWRIGHT, D. & HARARY, F. (1956). Structural balance: a generalization of Heider's theory . Psychol. Rev.63, 277-293 .
5.
FRAENKEL, A. A. & BAR-HILLEL, Y. (1955). Foundations of set theory. Amsterdam: North Holland Publishing Co.
6.
HARARY, F. , NORMAN, R. Z. & CARTWRIGHT, D. (1964). Structural models: an introduction to the theory of directed graphs. New York: Wiley .
7.
HEWER, F. (1958). The psychology of interpersonal relations. New York: Wiley .
8.
LUCE, R. D. (1959). Individual choice behavior. A theoretical analysis. New York & London: Wiley .
9.
MALINOWSKI, B. (1945). The dynamics of culture change. New Haven: Yale University Press; London: Oxford University Press .
10.
NADEL, S. F. (1957). The theory of social structure. Melbourne: Melbourne University Press .
11.
OESER, O. A. & HARARY, F. (1962). A mathematical model for structural role theory , I. Hum. Relat.15, 89-109 .
12.
RESTLE, F. (1961). Psychology of judgment and choice: a theoretical essay. New York & London: Wiley .
13.
RUSSELL, BERTRAND (1903). Principles of mathematics. London: Cambridge University Press .
14.
SHANNON, C. E. & WEAVER, W. (1949). The mathematical theory of communication. Urbana: University of Illinois Press .
15.
WILDER, R. L. (1952). Introduction to the foundations of mathematics. New York: Wiley; London: Chapman & Hall .
