Adler, Michael & Erio Ziglio (1996) Gazing Into the Oracle: The Delphi Method and Its Application to Social Policy and Public Health, (Jessica Kingsley Publishers, 1996). ([2])
doi.org
Dalkey, Norman; Helmer, Olaf (). „An Experimental Application of the Delphi Method to the use of experts”. Management Science. 9 (3): 458–467. doi:10.1287/mnsc.9.3.458.
Rescher(1998): Predicting the Future, (Albany, NY: State University of New York Press, 1998). ([3], [4], [5])
repec.org
ideas.repec.org
Green, Armstrong, and Graefe (2007): Methods to Elicit Forecasts from Groups: Delphi and Prediction Markets Compared. Foresight: The International Journal of Applied Forecasting (Fall 2007). PDF format[1]
Green, Armstrong, and Graefe (2007): Methods to Elicit Forecasts from Groups: Delphi and Prediction Markets Compared. Foresight: The International Journal of Applied Forecasting (Fall 2007). PDF format[1]
vt.edu
scholar.lib.vt.edu
"JVTE v15n2: The Modified Delphi Technique - A Rotational Modification," Journal of Vocational and Technical Education, Volume 15 Number 2, Spring 1999, web: VT-edu-JVTE-v15n2: of Delphi Technique developed by Olaf Helmer and Norman Dalkey.