1. McCormick, B.H., DeFanti, T.A., Brown, M.D.: Visualization in scientific computing. In: Computer Graphics, vol. 21, no. 6 (1987)
2. Shedroff, N.: An overview of understanding. In: Wurman, R.S. (ed.) Information Anxiety, 2edn., p. 27. Doubleday Books, New York (2000)
3. Mead, G.H.: Mind Self and Society, pp. 68–80. University of Chicago, Chicago (1992)
4. Popno, D.: Sociology, 10th edn., p. 620. Renmin University of China Press, Beijing (1999)
5. Encyclopedia of China. Sociology, p. 369. Encyclopedia of China Press, Beijing (1991)