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 ## External Papers
 
-* [:scroll:](a-note-on-distributed-computing.pdf) [A Note on Distributed Computing](http://www.eecs.harvard.edu/~waldo/Readings/waldo-94.pdf)
+* [:scroll:](a-note-on-distributed-computing.pdf) [A Note on Distributed Computing](http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=5A960A7B16A7BB42A99D7B6EFC30FB25?doi=10.1.1.41.7628&rep=rep1&type=pdf)
 
 * [A simple totally ordered broadcast protocol](http://diyhpl.us/~bryan/papers2/distributed/distributed-systems/zab.totally-ordered-broadcast-protocol.2008.pdf)