1. Valença, G., Alves, C., Heimann, V., Jansen, S., Brinkkemper, S.: Competition and collaboration in requirements engineering: a case study of an emerging software ecosystem. In: 2014 IEEE 22nd International Requirements Engineering Conference (RE), pp. 384–393. IEEE, August 2014
2. Teixeira, J., Robles, G., González-Barahona, J.M.: Lessons learned from applying social network analysis on an industrial Free/Libre/Open Source Software ecosystem. J. Internet Serv. Appl. 6(1), 14 (2015)
3. Rajala, R., Rossi, M., Tuunainen, V.K.: A framework for analyzing software business models. In: European Conference on Information Systems, pp. 1614–1627, June 2003
4. Väyrynen, K.: Software business in industrial companies: identifying capabilities for three types of software business. In: Proceedings of the 31st International Conference on Information Systems (ICIS), Saint Louis, MO (2010)
5. Vanhala, E., Smolander, K.: What do we know about business models in software companies?-systematic mapping study. Int. J. IADIS 11(3), 89–102 (2013)