Bartlett, Andrew: GENSEC - Designing a security subsystem (PDF) pp. 13, 2005. április 25. (Hozzáférés: 2010. március 28.) „The idea of a generic security API is not new [...] to implement, by some mechanism or other, a wide variety of these protocols, including SASL, GSS-API, SPNEGO as well as the proprietary NTLMSSP [...] in the wider open source world we see individual applications introduce similar abstraction layers, or adopt the Open Source Cyrus-SASL library to provide one.”