Move Over. Falling labour mobility in America may reflect a more efficient market // Economist, 2012, July 7.
52
William J. Clinton. Back to Work: Why We Need Smart Government for a Strong Economy. New York: Random House, 2011, p. 167.
53
См.: Jacqueline A. Stedall. From Cardano’s Great Art to Lagrange’s Reflections: Filling a Gap in the History of Algebra. Zurich: European Mathematical Society, 2011, p. 14.
