diff -rupN --no-dereference PDAL-2.5.0-src/doc/conf.py PDAL-2.5.0-src-new/doc/conf.py
--- PDAL-2.5.0-src/doc/conf.py	2023-01-13 18:18:05.000000000 +0100
+++ PDAL-2.5.0-src-new/doc/conf.py	2023-01-14 11:03:18.529434786 +0100
@@ -58,6 +58,7 @@ extensions = ['breathe', 'sphinx.ext.aut
               'sphinx.ext.mathjax', 'sphinx.ext.intersphinx',
               'sphinxcontrib.bibtex', 'embed']
 
+bibtex_bibfiles = ['bibliography.bib']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']