include my numbering into bibrefs

tex/bibliography.bib

-@book{IntroRiemannLee,
+@book{q3-IntroRiemannLee,
   doi = {10.1007/978-3-319-91755-9},
   year = {2018},
   publisher = {Springer International Publishing},
   author = {John M. Lee},
   title = {Introduction to Riemannian Manifolds}
 }
-@article{Ball2011,
+@article{q4-Ball2011,
   doi = {10.1007/s00205-011-0421-3},
   year = {2011},
   month = may,
@@ -17,7 +17,7 @@
   title = {Orientability and Energy Minimization in Liquid Crystal Models},
   journal = {Archive for Rational Mechanics and Analysis}
 }
-@article{Nitschke2018,
+@article{q5-Nitschke2018,
   doi = {10.1098/rspa.2017.0686},
   url = {https://royalsocietypublishing.org/doi/10.1098/rspa.2017.0686},
   year = {2018},

tex/scratchpad/chainrule.tex

@@ -10,7 +10,7 @@ I always struggle with the more-dimensional chainrule
 and with coordinates in differential geometry.
 Hence I tried to understand the Jacobian matrix
 representation of the \newTerm{differential of $F$ at $p$}
-as in \textcite[Tangent Vectors][377]{IntroRiemannLee}.
+as in \textcite[Tangent Vectors][377]{q3-IntroRiemannLee}.
 
 We have given
 \begin{itemize}
@@ -40,7 +40,7 @@ $dF_p(v) f = v(f ∘ F)$. Hence
   &= v^i \tanvecat{x^i}{p} (f ∘ F) \\
   &= v^i \tanvecat{x^i}{p} (f ∘ ψ^{-1} ∘ \hat F ∘ φ) && (\text{Def. } \hat F) \\
   &= v^i \rest{∂_i}{φ(p)} (f ∘ ψ^{-1} ∘ \hat F) \\
-  & \qquad (\text{Def. } \tanvecat{x^i}{p} \text{\textcite[A.2][377]{IntroRiemannLee}}) \\
+  & \qquad (\text{Def. } \tanvecat{x^i}{p} \text{\textcite[A.2][377]{q3-IntroRiemannLee}}) \\
   \intertext{Now we are in a purely flat setting and can apply the
     calculus chain rule for $f ∘ ψ^{-1} \colon ℝ^n \supseteq ψ(V) → ℝ$
     and $\hat F \colon ℝ^m \supseteq φ(U) → ℝ^n$}