1. http://smartcities.gov.in/writereaddata/SmartCityGuidelines.pdf
.
2. Smart Cities Mission of India.
https://www.india.gov.in/spotlight/smart-cities-mission-step-towards-smart-india
.
3. https://www.researchgate.net/publication/315804922
.
4. 1G, 2G, 3G, 4G—the evolution of wireless generations.
https://support.chinavasion.com/index.php?/Knowledgebase/Article/View/284/42/1g-2g-3g-4g—the-evolution-of-wireless-generations
.
5. The Open Group blog—5G technologies.
https://blog.opengroup.org/category/interoperability-2/
.