[RFC 2119] Bradner, S. (1997). Key words for use in RFCs to Indicate Requirement Levels. IETF RFC 2119.

[DNS-SD] Cheshire, S. & Krochmal, M. (2013). DNS-Based Service Discovery. IETF RFC 6763.

[CfC] Hasani, R. et al. (2022). Closed-form continuous-time neural networks. Nature Machine Intelligence, 4, 992–1003.

[Kuramoto] Kuramoto, Y. (1975). Self-entrainment of a population of coupled non-linear oscillators. Lecture Notes in Physics, 39, 420–422.

[SYM] Reference implementation (Node.js): github.com/sym-bot/sym

[SYM-Swift] Reference implementation (Swift): github.com/sym-bot/sym-swift

[Russell] Russell, J. A. (1980). A circumplex model of affect. Journal of Personality and Social Psychology, 39(6), 1161–1178.

[Autopoiesis] Maturana, H. & Varela, F. (1980). Autopoiesis and Cognition: The Realization of the Living. D. Reidel Publishing.