diff --git a/content/topic/against-the-coming-world-of-listening-machines.md b/content/topic/against-the-coming-world-of-listening-machines.md
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 [^halcyon_audio_1]: Interview with [Halcyon Lawrence](http://www.halcyonlawrence.com/) on August 31, 2020.
 [^Virilio]: LIBRARY Paul Virilio, *Sightless Vision*
 [^Faroki, Paglen]: LIBRARY; Mark Andrejevic, [Operational Listening (Eavesdropping)](https://youtu.be/OxOKlgsc3_M), recorded on August 10, 2018 
-[^Billy Li]: LIBRARY: Li et al, Adversarial Music: Real world Audio Adversary against Wake-word Detection System (2019)
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+[^Billy Li]: LIBRARY: Li et al, Adversarial Music: Real world Audio Adversary against Wake-word Detection System (2019). For a good introduction to adversarialism, see LIBRARY Goodfellow
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