SUG: Fix bib entry

2 files changed, 11 insertions, 3 deletions

diff --git a/guide/ch_astronomical_concepts.tex b/guide/ch_astronomical_concepts.tex
index 59788f3536..ac49637b9d 100644
--- a/guide/ch_astronomical_concepts.tex
+++ b/guide/ch_astronomical_concepts.tex
@@ -744,7 +744,8 @@ The following list describes sources and a few details about the models for $\De
   in \citetp{StephensonMorrisonHohenkerk:2016}. 
   The solution combines a spline fit to observations (used between the given limits) 
   with a parabolic fit (used as fallback outside the range, but without smooth transitions at the limits, i.e., 
-  values for 2016 and later deviate notably from current estimates, and should not be used for dates after 2015). The solution was updated in 2021\citetp{StephensonMorrisonHohenkerk:2021}.
+  values for 2016 and later deviate notably from current estimates, and should not be used for dates after 2015).
+  The solution was updated in \citetp{StephensonMorrisonHohenkerk:2021}.
   Recommended range of usage: between years -720.0 and 2019.0 $\dot{n}=-25.82''/\cy^2$.
   
 \item[Espenak \& Meeus (2006).] This solution by F. Espenak and J. Meeus, based on 
diff --git a/guide/guide.bib b/guide/guide.bib
index 697165963b..7a28679bc3 100644
--- a/guide/guide.bib
+++ b/guide/guide.bib
@@ -2018,7 +2018,7 @@ archivePrefix = {arXiv},
 
 @article{StephensonMorrisonHohenkerk:2021,
        author = {Morrison, L. V.  and Stephenson, F. R.  and Hohenkerk, C. Y.  and Zawilski, M. },
-        title = {Addendum 2020 to \&\#x2018;Measurement of the Earth\&\#x2019;s rotation: 720 BC to AD 2015\&\#x2019;},
+        title = {Addendum 2020 to `Measurement of the Earth's rotation: 720 BC to AD 2015'},
       journal = {Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences},
        volume = {477},
        number = {2246},
@@ -2027,5 +2027,12 @@ archivePrefix = {arXiv},
           doi = {10.1098/rspa.2020.0776},
           URL = {https://royalsocietypublishing.org/doi/abs/10.1098/rspa.2020.0776},
        eprint = {https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.2020.0776},
-     abstract = { Historical reports of solar eclipses are added to our previous dataset (Stephenson et al. 2016 Proc. R. Soc. A 472, 20160404 (doi:10.1098/rspa.2016.0404)) in order to refine our determination of centennial and longer-term changes since 720 BC in the rate of rotation of the Earth. The revised observed deceleration is −4.59 ± 0.08 × 10−22 rad s−2. By comparison the predicted tidal deceleration based on the conservation of angular momentum in the Sun–Earth–Moon system is −6.39 ± 0.03 × 10−22 rad s−2. These signify a mean accelerative component of +1.8 ± 0.1 × 10−22 rad s−2. There is also evidence of an oscillatory variation in the rate with a period of about 14 centuries. }
+     abstract = { Historical reports of solar eclipses are added to our previous dataset (Stephenson et al. 2016
+                  Proc. R. Soc. A 472, 20160404 (doi:10.1098/rspa.2016.0404)) in order to refine our
+                  determination of centennial and longer-term changes since 720 BC in the rate of rotation of the
+                  Earth. The revised observed deceleration is −4.59 ± 0.08 × 10−22 rad s−2. By comparison the
+                  predicted tidal deceleration based on the conservation of angular momentum in the
+                  Sun–Earth–Moon system is −6.39 ± 0.03 × 10−22 rad s−2. These signify a mean
+                  accelerative component of +1.8 ± 0.1 × 10−22 rad s−2. There is also evidence
+                  of an oscillatory variation in the rate with a period of about 14 centuries. }
 }