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[49] Hegerl, G. C., F. W. Zwiers, P. Braconnot, N. Gillett, Y. Luo, J. A. Marengo Orsini, N. Nicholls, J. E. Penner, and P. A. Stott. "Understanding and Attributing Climate Change." In Climate Change 2007: The Physical Science Basis, edited by S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor and H. L. Miller, 663-745. Vol. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK and New York, NY: Cambridge University Press, 2007.
[14] Santer, B. D., J. E. Penner, and P. W. Thorne. "How Well Can the Observed Vertical Temperature Changes be Reconciled With Our Understanding of the Causes of These Changes?" In Temperature Trends in the Lower Atmosphere: Steps for Understanding and Reconciling Differences, edited by T. R. Karl, S. J. Hassol, C. D. Miller and W. L. Murray, 89-118. Vol. Synthesis and Assessment Product 1.1. Washington, D.C.: U.S. Climate Change Science Program, 2006.