1 Correction to: Requirements Engineering https://doi.org/10.1007/s00766-019-00323-y

The article “Modular norm models: practical representation and analysis of contractual rights and obligations”, written by Sayonnha Mandal, Robin Gandhi and Harvey Siy, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 05 August 2019 without open access.

With the author(s)’ decision to opt for Open Choice the copyright of the article changed on September to © The Author(s) [2019] and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit original author(s) and the source, provide a link to the Creative Commons licence and indicate if changes were made.

The original article has been corrected.