XML Tutorial, [online]. [Accessed 20 April 2020]. Retrieved from: https://www.w3schools.com/xml/default.asp
KELLENBERGER, K., [2014]. Beginning T-SQL. Third edition. New York, NY: Distributed to the Book trade worldwide by Springer Science+Business Media. ISBN 1484200470 .
PERAHIA, Eldad a Robert STACEY, 2013. Next generation wireless LANs: 802.11n, 802.11ac, and Wi-Fi direct. Second edition. Cambridge, UK: Cambridge University Press. ISBN 1107016762 .