How to effectively define and measure maintainability Markus Pizka, Florian Deissenboeck IN TON DEKKERS, EDITOR, SMEF 2007 - 4TH SOFTWARE MEASUREMENT EUROPEAN FORUM, NUMBER ISBN 9-788870-909425, ROME, ITALY, MAY 2007 https://itestra.com/wp-content/uploads/2018/03/07_itestra_define_and_measure_maintainability.pdf