H. Saavalainen, Eurajoki became an open sewer -City of Rauma still using it as a water supply (in Finnish) Helsingin Sanomat 25, p.2014, 2014.

O. Reilly and T. , What Is Web 2.0: Design Patterns and Business Models for the Next Generation of Software http://www.oreilly.com, 2005.

M. N. Boulos, B. Resch, D. N. Crowley, J. G. Breslin, G. Sohn et al., Crowdsourcing, citizen sensing and sensor web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples, Int J Health Geographics, vol.10, p.6, 2011.

I. U. Sikder, A. Gangopadhyay, and N. V. Shampur, Interoperability in Web-Based Geospatial Applications, International Journal of Information Technology and Web Engineering, vol.3, issue.3, pp.66-88, 2008.
DOI : 10.4018/jitwe.2008070105

B. Nuseibeh and S. Easterbrook, Requirements engineering, Proceedings of the conference on The future of Software engineering , ICSE '00, 2000.
DOI : 10.1145/336512.336523

A. P. Tafti, S. Janosepah, N. Modiri, A. M. Noudeh, and H. Alizadeh, Development of a Framework for Applying ASYCUDA System with N-Tier Application Architecture, Software Engineering and Computer Systems, Part III. Communications in Computer and Information Science 181, pp.533-541, 2011.
DOI : 10.1007/978-3-642-22203-0_46

S. Jirka, A. Bröring, P. Kjeld, J. Maidens, and A. Wytzisk, A Lightweight Approach for the Sensor Observation Service to Share Environmental Data across Europe, Transactions in GIS, vol.4540, issue.3, pp.293-312, 2012.
DOI : 10.1111/j.1467-9671.2012.01324.x