Add some articles

Author: tfausak

content/issues/137.markdown

@@ -22,7 +22,27 @@ This is a weekly summary of what's going on in its community.
 
 ## In brief
 
-undefined
+-   [A Home for Orphan Instances](http://tech.freckle.com/2018/12/12/a-home-for-orphan-instances/)
+-   [Basic Catamorphisms - Recursion Schemes By Example](https://np.reddit.com/r/haskell/comments/a3spnm/basic_catamorphisms_recursion_schemes_by_example/)
+-   [Clock and reference](https://typeclasses.com/news/2018-12-clock-and-reference)
+-   [DIY benchmark history with Criterion and Shiny](https://www.tweag.io/posts/2018-12-12-benchgraph.html)
+-   [Down with Show! Part 1: Rules of thumb for when to use a type class](https://harry.garrood.me/blog/down-with-show-part-1/)
+-   [Finding correct (lens) laws](http://oleg.fi/gists/posts/2018-12-12-find-correct-laws.html)
+-   [Getting Started with the Haskell AWS Lambda Runtime](https://medium.com/the-theam-journey/getting-started-with-the-haskell-aws-lambda-runtime-951b2322c7a3)
+-   [GHC 8.6.3 released](https://ghc.haskell.org/trac/ghc/blog/ghc-8.6.3-released)
+-   [Guidelines for respectful communication](https://mail.haskell.org/pipermail/haskell/2018-December/025578.html)
+-   [Higher-rank and higher-kinded types](https://www.stephanboyer.com/post/115/higher-rank-and-higher-kinded-types)
+-   [Introduction to Tagless Final](https://serokell.io/blog/2018/12/07/tagless-final)
+-   [My first proper Idris program](https://blog.rcook.org/blog/2018/first-proper-idris-program/)
+-   [Naming abstraction](https://blog.poisson.chat/posts/2018-12-09-naming-abstraction.html)
+-   [New user empathy](https://www.snoyman.com/blog/2018/12/new-user-empathy)
+-   [Observable as an open interface for handling executing processes and property testing](https://iokasimov.github.io/posts/2018/12/observable)
+-   [Purescript III: Making a Web Page with Purescript and React!](https://mmhaskell.com/blog/2018/10/29/purescript-iii-web-pages-with-react)
+-   [Rest-ish Services in Haskell Part 3](https://vadosware.io/post/rest-ish-services-in-haskell-part-3/)
+-   [Shifting the Stars: Advent of Code with Galilean Optimization](https://blog.jle.im/entry/shifting-the-stars.html)
+-   [Some results about algebraic graphs homomorphisms](https://blog.nyarlathotep.one/2018/12/algebraic-graphs-homomorphisms/)
+-   [United Monoids](https://blogs.ncl.ac.uk/andreymokhov/united-monoids/)
+-   [Zooming In on Field Accessors](https://www.benjamin.pizza/posts/2018-12-06-zooming-in-on-field-accessors.html)
 
 ## Package of the week