Adds bib

src/bib.bib

@@ -849,3 +849,12 @@
   year={2018},
   publisher={Elsevier}
 }
+
+@inproceedings{du2011tilt,
+  title={Tilt \& touch: Mobile phone for 3D interaction},
+  author={Du, Yuan and Ren, Haoyi and Pan, Gang and Li, Shjian},
+  booktitle={Proceedings of the 13th international conference on Ubiquitous computing},
+  pages={485--486},
+  year={2011},
+  organization={ACM}
+}