
Fig. 1
Smart city elements
Source: elaborated by the authors based on (Stawasz & Sikora-Fernandez, 2016; Zanella et al., 2014; Caragliu et al., 2011).

Fig. 2
Results of the search in the Scopus database — the document type criterion (indexed from January 2009 to May 2019)

Fig. 3
Results of the search in the Web of Science database — the document type criterion (indexed from January 2009 to May 2019)

Fig. 4
Number of publications in the field of “smart city” in Scopus and Web of Science databases (indexed from January 2009 to May 2019)

Fig. 5
Identified publications in terms of a subject area (Scopus database, indexed from January 2009 to May 2019)

Fig. 6
Identified publications in terms of a subject area (Web of Science database, indexed from January 2009 to May 2019)

Fig. 7
Map of sub-areas related to the “smart city” concept
Tab. 1
Sub-areas and main issues of smart city research

Fig. 8
Identified subareas related to smart city elements