Trach, Olga     Functional-network model of tasks performance of the virtual communities life cycle directions [Текст] / Olga Trach, Andriy Peleshchyshyn // Computer Science and Information Technologies CSIT'2016 : proc. of the XI-th Intern. Scientific and Techn. Conf., 6-10 Sept. 2016, Lviv, Ukraine / Min. of Education and Science of Ukraine, Lviv Polytechn. Nat. Univ. — Lviv : Lviv Polytechnic Publ. House, 2016. — P. 108-110.