Rename ref names with slashes. They are not converted correctly in html and they are potential problems
Examples:
Legal history of cannabis in Canada: <ref name=laws-lois.justice.gc.ca/eng/acts/c-38.8">
Murder of Alice Gross: <ref name=Sky 7/7>, <ref name=Sky 7/7/>
Nitroxoline: <ref name=doi=10.1093/jnci/djq457>
Flag of Greece: <ref name=PD 201/1998>, <ref name=PD 201/1998 />
Civilian casualty ratio: <ref name="The 1982 Israeli invasion of Lebanon: the casualties". race & Class 24(4):340-3. 1983. doi:10.1177/030639688302400404>
Chronic fatigue syndrome: <ref name =doi=10.7326/M15-0338>, <ref name =doi=10.7326/M15-0338/>
Billie Kay: <ref name=NXT 9/30/15>, <ref name=NXT 9/30/15/>
Battle of Anholt: <ref name=The European magazine, and London review, Volumes 59-60 (08/06/2011).>