Index: docs/weeks/4.md
==================================================================
--- docs/weeks/4.md
+++ docs/weeks/4.md
@@ -1,11 +1,12 @@
 # Week 4
 
 ## Lecture
 
 Readings
-: - TK
+: - Spitzberg et al. (2020)
+- Spitzberg and Schneider (2022)
 
 In this lecture, we will be joined by **Danny Spitzberg**.
 
 About our guest speaker:
 

Index: refs.bib
==================================================================
--- refs.bib
+++ refs.bib
@@ -143,5 +143,21 @@
   title   = {Crisis Text Line and the Silicon Valleyfication of Everything},
   journal = {Motherboard},
   date    = {2022-02-10},
   url     = {https://www.vice.com/en/article/wxdpym/crisis-text-line-and-the-silicon-valleyfication-of-everything},
 }
+@INPROCEEDINGS{Spitzberg2020,
+  author       = {Spitzberg, Danny and Shaw, Kevin and Angevine, Colin and Wilkins, Marissa and Strickland, M and Yamashiro, Janel and Adams, Rhonda and Lockhart, Leah},
+  title        = {Principles at Work},
+  subtitle     = {Applying \mkbibquote{Design Justice} in Professionalized Workplaces},
+  booktitle    = {CSCW '20 Workshop},
+  booksubtitle = {Collective Organizing and Social Responsibility},
+  date         = {2020-10-15},
+  doi          = {10.21428/93b2c832.e3a8d187},
+}
+@ARTICLE{Spitzberg2022,
+  author  = {Danny Spitzberg and Nathan Schneider},
+  title   = {You---Yes, You!---Would Be a Better Owner for {T}witter Than {E}lon {M}usk},
+  journal = {Wired},
+  date    = {2022-04-16},
+  url     = {https://www.wired.com/story/you-yes-you-would-be-a-better-owner-for-twitter-than-elon-musk/},
+}