BALES, R. F. (1951). Interaction process analysis. Cambridge, Massachusetts: Addison-Wesley .
2.
BALES, R. F. (1953). The equilibrium problem in small groups. In T. Parsons et al. (eds), Working papers in the theory of action. New York: Free Press , pp. 111-161.
3.
BALES, R. F. (1958). Task roles and social roles in problem-solving groups. In E. E. Maccoby et al. (eds), Readings in social psychology. New York: Henry Holt , pp. 437-447.
4.
BALES, R. F. & SLATER, P. E. (1955). Role differentiation in small decision-making groups. In T. Parsons et al. (eds), Family socialization and interaction process. Glencoe, Illinois: Free Press , pp. 259-306.
5.
BLAU, P. M. (1964). Exchange and power in social life. New York: Wiley .
6.
BERKOWITZ, L. (1953). Sharing leadership in small decision-making groups . J. abnorm. soc. psychol. 48, 231-238 .
7.
BURKE, P. J. (1967). The development of task and social-emotional role differentiation . Sociometry30, 379-392 .
8.
BURKE, P. J. (1968). Role differentiation and the legitimation of task activity . Sociometry31, 404-411 .
9.
GUSTAFSON, D. P. & HARRELL, T. W. (1970). A comparison of role differentiation in several situationsOrg. beb. hum. perf.5, 299-312 .
10.
HEINICKE, C. M. & BALES, R. F. (1953). Developmental trends in the structure of small groups . Sociometry16, 7-38 .
11.
LEADER, G. C. & MITCHELL, B. W. (1966). On intrinsic satisfaction. Unpublished working paper, Stanford University.
12.
PHILIP, H. & DUNPHY, D. (1959). Developmental trends in small groups . Sociometry22, 162-174 .
13.
SECORD, P. F. & BACKMAN, C. W. (1964). Social psychology. New York: McGraw-Hill .
14.
SCHRODER, R. (1964). Status-consensus, productivity and leadership differences in experimental and natural small groups. Unpublished Master's thesis, University of Iowa.
15.
SLATER, P. R. (1955). Role differentiation in small groups . Amer. soc. rev.20, 300-310 .
16.
SMITH, P. B. (1963). Differentiation between sociometric rankings: a test of four theories . Hum. relat.16, 335-350 .
17.
THEODORSON , G. A. (1957). The relationship between leadership and popularity roles in small groups . Amer. soc. rev.22, 58-67 .
18.
TURK, H. (1961). Instrumental values and the popularity of instrumental leaders . Social forces39, 252-260 .
19.
VERBA, S. (1961). Small groups and political behavior. Princeton, New Jersey: Princeton University Press .
20.
WEICK, K. E. (1964). Reduction of cognitive dissonance through task enhancement and effort expenditure.J. abnorm. soc. psychol. 68, 533-539 .
21.
WILSON, S. R. (1969). The effect of the laboratory situation on experimental discussion groups . Sociometry32, 220-236 .