1. UNECE: Sustainable Urban Mobility and Public Transport in UNECE capitals (2015). https://www.unece.org/fileadmin/DAM/trans/doc/2016/itc/ECE-TRANS-245.pdf
2. United Nations: Resolution A/RES/70/1. Transforming our world: the 2030 Agenda for Sustainable Development. Seventieth session of the United Nations General Assembly New York (USA), 25 September 2015, (2015). https://sustainabledevelopment.un.org/post2015/transformingourworld. Accessed 10 Dec 2019
3. United Nations: New Urban Agenda, United Nations, New York (2016). https://www2.habitat3.org/bitcache/99d99fbd0824de50214e99f864459d8081a9be00?vid=591155&disposition=inline&op=view. Accessed 21 Nov 2019
4. Lecture Notes in Computer Science;J Dvarioniene,2017
5. Lecture Notes in Computer Science;F Scorza,2016