Maybe you can find the answer to your question in the original papers? These are probably the publications:
Ross, L., Lepper, M.R. and Hubbard, M. (1975) Perseverance in Self-Perception and Social Perception: Biased Attributional Processes in the Debriefing Paradigm. Journal of Personality and Social Psychology, 32, 880-892.
https://sci-hub.st/https://doi.org/10.1037/0022-3514.32.5.88...
Anderson, C.A., Lepper, M.R., & Ross, L. (1980). The perseverance of social theories: The role of explanation in the persistence of discredited information. Journal of Personality and Social Psychology, 39, 1037-1049.