Michael Joyce, David Miles, Andrew Scott & Dimitri Vayanos, Quantitative Easing and Unconventional Monetary Policy – An Introduction, The Economic Journal, Vol. 122, No. 564 (November 2012), pp. F271-F288: "The most high-profile form of unconventional monetary policy has been Quantitative Easing (QE)."
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Ricardo Reis, "Funding Quantitative Easing to Target Inflation," in "Designing Resilient Monetary Policy Frameworks for the Future,” Proceedings of the Jackson Hole Economic Policy Symposium: Federal Reserve Bank of Kansas City, August 2016, pp. 423–478.