Barber M., “Wildcards – Signals from a future near you”, Journal of Futures Studies, Aug. 2006, https://jfsdigital.org/articles-and-essays/2006-2/vol-11-no-1-august/articles/wildcards-signals-from-a-future-near-you/

Fergnani A., Wild Cards: What They Are and How to Use Them in Futures & Foresight, 2021

Hauptman A. and Steinmüller K., “Surprising Scenarios. Imagination as a Dimension of Foresight” Chapter in the book: Envisioning Uncertain Futures, Springer, 2018, https://doi.org/10.1007/978-3-658-25074-4_4

Hiltunen E.,  “Was It a Wild Card or Just Our Blindness to Gradual Change?”, Journal of Futures Studies, November 2006, 11(2): 61 – 74

Hiltunen, E., Basic Concepts of Foresight Work, https://www.whatsnext.fi/infographic/

Petersen J., and Steinmueller K., Chapter 10: Wild Cards, Futures Research Methodologies, Futures Research Methodology, Millennium Project, http://www.millennium-project.org/publications-2/futures-research-methodology-version-3-0/

Project iKNOW: http://wiwe.iknowfutures.org/

Schwartz, P. & Randall, D. (2007). "Anticipating Strategic Surprises", Chapter in F. Fukuyama (Ed.), Blindside - How to Anticipate Forcing Events and Wild Cards in Global Politics. Washington, D.C.: Brookings Institution Press

Taleb, N., The Black Swan: The Impact of the Highly Improbable. 2007

Wheelwright V.,  Small Business Foresight, 2012 http://docshare04.docshare.tips/files/12196/121960221.pdf