The Stanford Encyclopedia of Philosophy

A conference, workshop or journal: the thing that recurs, across all its years.

A reference work maintained by the Metaphysics Research Lab at Stanford, in which every entry is written by a specialist and kept up to date rather than frozen at publication. Entries are refereed by a subject editor and revised over time, which makes it citable in a way an encyclopaedia usually is not — and it is free to read.

https://plato.stanford.edu/

2 references

Gödel's incompleteness theorems
Panu Raatikainen (2020) · The Stanford Encyclopedia of Philosophy
Non-wellfounded Set Theory
Lawrence S. Moss (2018) · The Stanford Encyclopedia of Philosophy