1. Study on Provision of Low-Cost Machine-Type Communications (MTC) User Equipments (UEs) Based on LTE, 3GPP Technical Report (TR) 36.888/r12, 2013.
2. 3GPP. Standardization of NB-IOT Completed. www.3gpp.org/news-events/3gpp-news/1785-nb iot complete, June 2016.
3. 3GPP Technical Report (TR) 36.888/r12, Study on Provision of Low-Cost Machine-Type Communications (MTC) User Equipments (UEs) Based on LTE, 2013. http://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=2578
4. Rico-Alvarino, A., Vajapeyam, M., Xu, H., Wang, X., Blankenship, Y., Bern, J., Tirronen, T., and Yavuz, E., An Overview of 3GPP Enhancements on Machine to Machine Communications, IEEE Commun. Mag., 2016, vol. 54, no. 6, pp. 14–21.
5. In December 2017, State Committee on Radiofrequencies Made a decision to Allot Frequencies for NBIoT Systems. https://digital.gov.ru/ru/documents/5875/