Englebretsen, G. (2012). Robust reality: An essay in formal ontology. Ontos Verlag.
Lua i Stíl Chicago (17ú heag.)Englebretsen, George. Robust Reality: An Essay in Formal Ontology. Frankfurt: Ontos Verlag, 2012.
Lua MLA (9ú heag.)Englebretsen, George. Robust Reality: An Essay in Formal Ontology. Ontos Verlag, 2012.
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