Литвин, Василь Володимирович, and Дмитро Ілліч Угрин. “Intellectual Agents Activity Modelling in Tourist Sphere With Usage of the Ontologic Approach”. Eastern-European Journal of Enterprise Technologies 2, no. 2(50) (January 12, 2012): 12–16. Accessed May 3, 2024. https://journals.uran.ua/eejet/article/view/1725.