DOC: adds a new reference [skip ci]

Author: miykael

notebooks/resources_resources.ipynb

@@ -18,6 +18,7 @@
     "- [fMRI 4 Newbies](http://www.fmri4newbies.com/tutorials/): A crash course in brain imaging.\n",
     "- [Neurostars.org](https://neurostars.org/): If you have any questions about Neuroinformatics, this is the place to go! \n",
     "- [Design efficiency in FMRI](http://imaging.mrc-cbu.cam.ac.uk/imaging/DesignEfficiency): A nice and detailed guide on how to design a good fMRI study.\n",
+    "- [Questions and Answers in MRI](http://mriquestions.com/how-does-fmri-work.html): This is a great resource for anybody who wants to understand MRI and the physics behind it a bit better!\n",
     "\n",
     "\n",
     "## Open Science Resources\n",