1. Fazio M, Paone M, Puliafito A, Villari M (2012) Heterogeneous sensors become homogenous things in smart cities. In: IEEE 6th international conference on innovative mobile and internet services in ubiquitous computing (IMIS), pp 775–780
2. Centre of Regional Science (2007) Smart cities. Ranking of European Medium-Sized Cities. Vienna University of Technology, http://www.smart-cities.eu. Accessed 21 Oct 2019
3. http://iot.ee.surrey.ac.uk:8080/datasets.html#parking. Accessed 21 Oct 2019
4. Yaseen ZM, Sulaiman SO, Deo RC, Chau KW (2019) An enhanced extreme learning machine model for river flow forecasting: state-of-the-art, practical applications in water resource engineering area and future research direction. J Hydrol 569:387–408
5. Najafi B, Ardabili SF, Shamshirband S, Chau KW, Radzuk T (2018) Application of ANNs, ANFIS and RSM to estimating and optimizing the parameters that affect the yield and cost of biodiesel production. Eng Appl Comput Fluid Mech 12(1):611–624