diff --git a/03_data_science_practice.Rmd b/03_data_science_practice.Rmd
index 84e47a7..b08a539 100644
--- a/03_data_science_practice.Rmd
+++ b/03_data_science_practice.Rmd
@@ -297,7 +297,10 @@ John D. Blischak, Emily R. Davenport, Greg Wilson (2016-01-19) ["A Quick Introdu
 
 <blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">&quot;Writing documentation is all about making future you remember things that present you knows future you will forget&quot; -- <a href="https://twitter.com/data_stephanie?ref_src=twsrc%5Etfw">/@/data_stephanie</a> <a href="https://twitter.com/hashtag/rstats?src=hash&amp;ref_src=twsrc%5Etfw">#rstats</a> <a href="https://twitter.com/hashtag/Rladies?src=hash&amp;ref_src=twsrc%5Etfw">#Rladies</a></p>&mdash; R-Ladies Chicago (/@/RLadiesChicago) <a href="https://twitter.com/RLadiesChicago/status/963576859152744456?ref_src=twsrc%5Etfw">February 14, 2018</a></blockquote>
 
+* Sébastien Rochette, 2019-07-10, [Rmd first: When development starts with documentation](https://www.r-bloggers.com/rmd-first-when-development-starts-with-documentation/)
 
+  - see also [RMarkdown]
+  
 
 ### Literate programming