update refs

References.bib

@@ -29,6 +29,25 @@ @misc{SpECwebsite
   note = "\url{http://www.black-holes.org/SpEC.html}"
 }
 
+@software{spectrecode,
+    author = "Deppe, Nils and Throwe, William and Kidder, Lawrence E. and Vu,
+Nils L. and Nelli, Kyle C. and Armaza, Crist\'obal and Bonilla, Marceline S. and
+H\'ebert, Fran\c{c}ois and Kim, Yoonsoo and Kumar, Prayush and Lovelace,
+Geoffrey and Macedo, Alexandra and Moxon, Jordan and O'Shea, Eamonn and
+Pfeiffer, Harald P. and Scheel, Mark A. and Teukolsky, Saul A. and Wittek,
+Nikolas A. and others",
+    title = "\texttt{SpECTRE v2023.10.11}",
+    version = "2023.10.11",
+    publisher = "Zenodo",
+    doi = "10.5281/zenodo.8431874",
+    url = "https://spectre-code.org",
+    howpublished =
+"\href{https://doi.org/10.5281/zenodo.8431874}{10.5281/zenodo.8431874}",
+    license = "MIT",
+    year = "2023",
+    month = "10"
+}
+
 @misc{SXSCatalog,
   author = {{SXS Collaboration}},
   title = {The {SXS} Collaboration catalog of gravitational waveforms},