7Ammons, D. N. & Rivenbark, W. C. (2008). Factors Influencing the Use of Performance Data to Improve Municipal Services : Evidence from the North Carolina Benchmarking Project. Public Administration Review, 68(2) : 304 - 318.
8Behn, R. D. ( 2003 ) . Why Measure Performance? Different Purposes Require Different Measures.Public Administration Review, 63(5) : 586 - 606.
9Blatter, J. & Blume, T. (2008). In Search of Co - variance, Causal Mechanisms or Congruence? Towards a Plural Understanding of Case Studies. Swiss Political Science Review, 14 ( 2 ): 315 -356.
10Blatter, J. & Haverland, M. ( 2012 ) . Designing Case Studies : Explanatory Approaches in Small - N Research. Basingstoke: Palgrave Macmillan.
