Add the volume number

Error²Federal courts, Illinois courts21st and 22nd editions

A Strasbourg case of the 1999-to-2015 period cited to the Court's reporter carries a volume in front of it: a running number, a number with a part letter, or a year with a Roman numeral.¹

1. 1R. 21.5.3 European Court of Human Rights.
2. 2An error: the rule in note 1 allows one form, and this is not it.