A Portal for Cross-Administrative Acquisition and Specification of Software Requirements. - Norman Riegel; Holger Branding; Michael Geisser; Tobias Hildenbrand (PRIMIUM, 2008)

Using Enhanced Wiki-based Solutions for Managing Requirements. - Özgür Ünalan; Norman Riegel; Sebastian Weber; Jörg Dörr (MARK@RE, 2008)

IT Capability-Based Business Process Design through Service-Oriented Requirements Engineering. - Sebastian Adam; Özgür Ünalan; Norman Riegel; Daniel Kerkow (BMMDS/EMMSAD, 2009)

The role of quality aspects for the adequacy of business processes and business information systems. - Sebastian Adam; Norman Riegel; Jörg Dörr (Int. J. Bus. Process. Integr. Manag., 2009)

Addressing requirements engineering challenges in the context of Emergent Systems. - Norman Riegel; Sebastian Adam; Anne Gross (RESS, 2011)

Is It Beneficial to Match Reusable Services Earlier? - Sebastian Adam; Özgür Ünalan; Norman Riegel (REFSQ, 2011)

A Conceptual Foundation of Requirements Engineering for Business Information Systems. - Sebastian Adam; Norman Riegel; Anne Gross; Özgür Ünalan; Simon Darting (BMMDS/EMMSAD, 2012)

Model-based prioritization in business-process-driven software development. - Norman Riegel (RE, 2012)

From business processes to software services and vice versa - an improved transition through service-oriented requirements engineering. - Sebastian Adam; Norman Riegel; Jörg Dörr; Özgür Ünalan; Daniel Kerkow (J. Softw. Evol. Process., 2012)

A Methodological Framework with Lessons Learned for Introducing Business Process Management. - Sebastian Adam; Norman Riegel; Matthias Koch (BMMDS/EMMSAD, 2013)

Modellbasierte Priorisierung in geschäftsprozessgetriebener Softwareentwicklung. - Norman Riegel (Softwaretechnik-Trends, 2013)

An Analysis of Priority-Based Decision Heuristics for Optimizing Elicitation Efficiency. - Norman Riegel; Jörg Dörr (REFSQ, 2014)

A Systematic Literature Review of Requirements Prioritization Criteria. - Norman Riegel; Jörg Dörr (REFSQ, 2015)

Adaptive Arbeitsunterstützung in maßgeschneiderten Anforderungsprozessen. - Sebastian Adam; Norman Riegel; Hartmut Schmitt (Softwaretechnik-Trends, 2016)

Prioritization in incremental requirements engineering. - Norman Riegel (Fraunhofer Verlag, 2016)