diff --git a/_bibliography/papers.bib b/_bibliography/papers.bib
index a3ed37574e8a..f6d8b6bc4505 100644
--- a/_bibliography/papers.bib
+++ b/_bibliography/papers.bib
@@ -3,6 +3,14 @@
@string{aps = {American Physical Society,}}
+@book{einstein1920relativity,
+ title={Relativity: the Special and General Theory},
+ author={Einstein, Albert},
+ year={1920},
+ publisher={Methuen & Co Ltd},
+ html={relativity.html}
+}
+
@book{einstein1956investigations,
bibtex_show={true},
title={Investigations on the Theory of the Brownian Movement},
diff --git a/_layouts/bib.liquid b/_layouts/bib.liquid
index 5f6218e35948..aca79fbeb86d 100644
--- a/_layouts/bib.liquid
+++ b/_layouts/bib.liquid
@@ -166,7 +166,11 @@
Bib
{% endif %}
{% if entry.html %}
- HTML
+ {% if entry.html contains '://' %}
+ HTML
+ {% else %}
+ HTML
+ {% endif %}
{% endif %}
{% if entry.pdf %}
{% if entry.pdf contains '://' %}
diff --git a/assets/html/relativity.html b/assets/html/relativity.html
new file mode 100644
index 000000000000..7d3472acc569
--- /dev/null
+++ b/assets/html/relativity.html
@@ -0,0 +1,10 @@
+
+
+
+ Relativity: the Special and General Theory
+ Albert Einstein
+
+ Insert HTML document here.
+
+
+