Update README.md

README.md

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 The following repo allows to build Entangled MAM examples to send and receive messages via the new MAM Protocol using Cmake instead of Bazel. The main reason to transition from Bazel to Cmake is portability: Bazel does not perform very well on IoT devices (it does not even provide an installer for Raspberry Pi3B). 
 
 ## Why do we need this?
-Since IOT2TANGLE requires us to build code to send data over MAM2 on different IoT devices, a build system that can run on SoCs such as ESP32, STM32, etc. was needed to compile the required code. Cmake allows us to do so while keeping a clear relation with Entangled modifications. 
+Since [IOT2TANGLE](https://medium.com/@xdk2mam/xdk2mam-introduces-iot2tangle-a-proposal-to-extend-integration-between-iot-devices-and-iota-148c321cefeb) requires us to build code to send data over MAM2 on different IoT devices, a build system that can run on SoCs such as ESP32, STM32, etc. was needed to compile the required code. Cmake allows us to do so while keeping a clear relation with Entangled modifications. 
 
 This repositorie reflects official Entangled 100% adding only the headers generated by Bazel and the CMakeLists.txt files to indicate dependencies and targets. Future modifications on Entangled should be easily absorved by adding new headers if needed and entries to the CMakesLists.txt files.