books.google.co.uk - "This book is highly recommended for all those whose interests lie in the fields that deal with any kind of information measures. It will also find readers in the field of functional analysis..".Mathematical Reviews...http://books.google.co.uk/books/about/Characterizations_of_Information_Measure.html?id=OPg_L04nem4C&q=additive+function&utm_source=gb-gplus-shareCharacterizations of Information Measures
