A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
R. Selten Bielefeld. "Reexamination of the Perfectness Concept for Equilibrium Points in Extensive Games." Theory and Decision Library C: Game Theory, Mathematical Programming and Operations Research (1988) 1-31