There have been a number of criticisms of Setterfield's Theory, in both the mainstream scientific community and the creationist community.<ref>[http://www.ldolphin.org/setterfield/discuss.html ''The Vacuum, Light Speed, and the Redshift;Discussion Questions and Comments with Responses from Barry Setterfield'']</ref><ref>[http://www.trueorigin.org/ca_bs_02.php ''Barry Setterfield answers Robert Day'']</ref><ref>[http://setterfield.org/GSRcritics.html ''Responses to Critics'']</ref>
+
There have been a number of criticisms of Setterfield's Theory, in both the mainstream scientific community and the creationist community.<ref>[http://www.ldolphin.org/setterfield/discuss.html ''The Vacuum, Light Speed, and the Redshift;Discussion Questions and Comments with Responses from Barry Setterfield'']</ref><ref>[http://www.setterfield.org/constc/bowden.html ''The Decrease in the Speed of Light- an Update on Developments'']</ref><ref>[http://www.trueorigin.org/ca_bs_02.php ''Barry Setterfield answers Robert Day'']</ref><ref>[http://setterfield.org/GSRcritics.html ''Responses to Critics'']</ref>