Update links.md

Author: stevekrouse

links.md

@@ -13,13 +13,15 @@ title: Link Research
 * [General Principles for a Generalized Idea Garden](https://www.researchgate.net/publication/313369217_General_Principles_for_a_Generalized_Idea_Garden)
   * get back to Jonathan Edwards after reading this one!
 * [Usability Analysis of Visual Programming Environments](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.35.815&rep=rep1&type=pdf)
+* [A Module System for a General-Purpose Blocks Language](http://www.vpri.org/pdf/tr2015003_modsys.pdf)
 * [CycleJS Component Difficulties](https://www.youtube.com/watch?v=CU8jtb6UBGg&feature=youtu.be&t=46m15s)
 * https://noflojs.org/
 * [Joe Edelman - citizen logisitics](http://nxhx.org/) and [Chatterbase](http://alpha.trycarbide.com/@jxe/6d5e19369ddb9cc4728510e11a3f7586)
 
 
 ### Unordered
 
+* [code.world](https://code.world/#PgOPqtxOVsfDQJe7-GkGdnQ)
 * [SKETCHPAD A MAN-MACHINE GRAPHICAL COMMUNICATION SYSTEM - Sutherland](https://www.cs.purdue.edu/homes/hosking/197/canon/sutherland.pdf)
 * look into heap analytics for its similarity to streamsheets (from Joe West)
 * research moon script and the indie game community as it pertains to influencing WoofJS (joe west reccomended this)