doc: procedure

doc/report.bib

@@ -6,5 +6,15 @@
   number={4},
   pages={458--489},
   year={2006},
-  publisher={ACM New York, NY, USA}
+  publisher={ACM New York, NY, USA},
+  url={https://depts.washington.edu/acelab/proj/texttest/},
+}
+@incollection{nasatlx,
+  title={Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research},
+  author={Hart, Sandra G and Staveland, Lowell E},
+  booktitle={Advances in psychology},
+  volume={52},
+  pages={139--183},
+  year={1988},
+  publisher={Elsevier}
 }