Ragin, C.C., and H.S. Becker (Eds.) 1992 What Is a Case? Exploring the Foundations of Social Inquiry. Cambridge: Cambridge University Press.
Robinson, W.S. 1950 Ecological Correlation and Behavior of Individuals. American Sociological Review 15:351–357.
Sampson, R.J., and J.L. Lauritsen 1990 Violent Victimization and Offending: Individual-, Situational-, and Community-Level Risk Factors.” Pp. 1–115 in Understanding and Preventing Violence: Social Influences, A.J. Reiss and J.A. Roth, eds. Washington, DC.: National Academy Press.
Simon, H.A. 1996 The Sciences of the Artificial. Cambridge, MA: MIT Press.
Strauss, A., and J. Corbin 1998 Basics of Qualitative Research. Thousand Oaks, CA: Sage Publications.
Sullivan, M.L. 1998 Integrating Qualitative and Quantitative Methods in the Study of Developmental Psychopathology in Context. Development and Psychopathology 10:377–393.
Vygotsky, L.S. 1978 Mind in Society: The Development of Higher Psychological Processes. Cambridge, MA: Harvard University Press.
Yin, R.K. 1989 Case Study Research: Design and Methods. Newbury Park: Sage Publications.