commit ee9f7a409259b1bc85e83ffce446fdfba482c800
from: mischa <git@high5.nl>
date: Sun Apr 07 07:26:42 2019 UTC

added reference documents

commit - af599e02842f523bea1467a65ce2a076997a8a8b
commit + ee9f7a409259b1bc85e83ffce446fdfba482c800
blob - 61cb8248c04640f2293451011165cca1afbf7dcc
blob + e9b50e814f115a22539c7a8c32a00597da2206c8
--- index.md
+++ index.md
@@ -6,6 +6,8 @@ These all work with at least [nvi](https://en.wikipedi
 Helpful documents:<br />
 - [Roman Zolotarev: Edit text with vi(1)](https://rgz.ee/vi.html)<br />
 - [Jeff W: vi help](http://www.jeffw.com/vi/vi_help.txt)<br />
+- [Maarten Litmaath: vi reference](http://www.ungerhu.com/jxh/vi.html)<br />
+- [alphanrrrd: extremely concise cheatsheet](http://www.alphanrrrd.org/vi.html)<br />
 - [ViEmu: Graphical vi cheatsheet](http://www.viemu.com/a_vi_vim_graphical_cheat_sheet_tutorial.html)
 
 #### Yank / delete an arbitrary number of lines