diff --git a/alpha_spectroscopy/urls b/alpha_spectroscopy/urls
new file mode 100644
index 0000000..75c4595
--- /dev/null
+++ b/alpha_spectroscopy/urls
@@ -0,0 +1,5 @@
+
+
+
+
+http://www.google.com/patents/EP1140212A2?cl=en
\ No newline at end of file