diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -136,10 +136,15 @@ At the moment this is not useful for anyone but myself, if at some point I find
          * ["An Introduction to Programming with Threads"](https://s3.amazonaws.com/content.udacity-data.com/courses/ud923/references/ud923-birrell-paper.pdf) by Birrell 📰 🆓
          * POSIX Threads (PThreads)
            * [PThreads / POSIX Threads Coding Examples](https://computing.llnl.gov/tutorials/pthreads/) 📰 🆓
+        * [Beyond Multiprocessing: Multithreading the Sun OS Kernel by Eykholt](https://s3.amazonaws.com/content.udacity-data.com/courses/ud923/references/ud923-eykholt-paper.pdf) 📰 🆓
+        * [Implementing Lightweight Threads by Stein and Shah](https://s3.amazonaws.com/content.udacity-data.com/courses/ud923/references/ud923-stein-shah-paper.pdf) 📰 🆓
        * Virtual Memory
          * mmap
-           * [How processes get more memory](https://www.youtube.com/watch?v=XV5sRaSVtXQ)
-           * [How to Map Files into Memory in C (mmap)](https://www.youtube.com/watch?v=m7E9piHcfr4)
+           * [How processes get more memory](https://www.youtube.com/watch?v=XV5sRaSVtXQ) 📼 🆓
+           * [How to Map Files into Memory in C (mmap)](https://www.youtube.com/watch?v=m7E9piHcfr4) 📼 🆓
+       * Linux
+         * [Linux Cross Reference](https://elixir.bootlin.com/linux/v3.17/source/include/linux/kthread.h#L66) 🌍 🆓
+         * [Interactive Linux Kernel Map](http://www.makelinux.net/kernel_map/) 🌍 🆓
        * Reference Youtube channels
          * [Jacob Sorber](https://www.youtube.com/channel/UCwd5VFu4KoJNjkWJZMFJGHQ)
     * Network