Shatovska, Tetyana, Victor Kauk, and Ievgen Kovalov. “Methods for Building Geo-Social Systems in the Internet. Mobile Applications Technologies”. Eastern-European Journal of Enterprise Technologies 3, no. 4(45) (May 28, 2010): 16–18. Accessed July 20, 2024. https://journals.uran.ua/eejet/article/view/2807.