G. Hooft. (1998)cite arxiv:hep-th/9808154Comment: small but important corrections were made as a response to several reactions. Minor typos corrected. 17 pages plain TeX, 4 figures PostScript.
G. Hooft. (2021)cite arxiv:2103.04335Comment: 13 pages, no figures, Submitted to "Quantum Mechanics and Fundamentality: Naturalizing Quantum Theory between Scientific Realism and Ontological Indeterminacy", ed. by Valia Allori, Springer Nature, Switzerland.