wip(abbreviations): introduce VIM into abbreviations

src/thesis/abbreviations.tex

@@ -4,8 +4,11 @@
 
 \begin{table}[ht]
   \centering
-  \begin{tabularx}{0.8\textwidth} {ll}
-    GUM & Guide to the expression of uncertainty in measurement
+  \begin{tabularx}{\textwidth} {ll}
+    GUM & Guide to the expression of uncertainty in
+    measurement~\cite{jcgm_evaluation_2009} \\
+    VIM & International vocabulary of metrology — Basic and general concepts and
+    associated terms~\cite{jcgm_international_2012}
     \label{tab:abbreviations}
   \end{tabularx}
 \end{table}