root.bib: Remove the question mark from the evans99 note

It would be nice to add citations showing this usage, but I don't
think I have time to dig them up.

diff --git a/src/root.bib b/src/root.bib
index 28199be69fe293e45d5bf77c6a3e98b8ee8d67bc..058ccd9c32b9a77698152747e13c0f6060d6db44 100644 (file)
--- a/src/root.bib
+++ b/src/root.bib
@@ -3177,7 +3177,7 @@
         force techniques.",
     note = "Develops Kramers improvement on Bell model for domain unfolding.
         Presents unfolding under variable loading rates. Often cited as the
-        ``Bell-Evans'' model? They derive a unitless treatment, scaling force
+        ``Bell-Evans'' model. They derive a unitless treatment, scaling force
         by $f_\beta$, TODO; time by $\tau_f$, TODO; elasiticity by compliance
         $c(f)$. The appendix has relaxation time formulas for WLC and FJC
         polymer models.",