Press
In: 43rd Spring Conference of the Union of Bulgarian Mathematicians, 4-6 April 2014, Borovetz, Bulgaria.
Élet és Tudomány ISSN 0013-6077
In: BJMT Conference of Applied Mathematics 2012, Győr, Hungary.
In: Multimedia Services and Streaming for Mobile Devices: Challenges and Innovations IGI Global, Hershey, pp. 133-153.