docs: add link

Author: hynek

docs/motivation.md

@@ -63,6 +63,10 @@ I hope you're now all motivated and ready to jump into our {doc}`tutorial`!
 ## Supplemental literature
 
 - The [*Exponential Backoff And Jitter*](https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/) article on the *AWS Architecture Blog* is a good explanation of the basics with pretty graphs.
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+- [*Addressing Cascading Failures*](https://sre.google/sre-book/addressing-cascading-failures/) is a relevant chapter from Google's [*Site Reliability Engineering* book](https://sre.google/books/).
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 - [*Resiliency in Distributed Systems*](https://blog.pragmaticengineer.com/resiliency-in-distributed-systems/) takes a broader view and explains how to build resilient systems in general.
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 - And finally, I've given a talk at PyCon US 2017 called [*Solid Snakes or: How to Take 5 Weeks of Vacation*](https://www.youtube.com/watch?v=YVuqeXyvOUc) that addresses the various aspects to take care of to... take five weeks of (uninterrupted!) vacation.
   This one has a stronger focus on Python and working at a smaller scale.