Gospodinova, Elitsa, Mario Angelov, and Taschko Nikolov. Analysis of a Security System for Distributed Data Transmission of Voice In MT&S-2013 Conference. Sofia: Defence Institute, 2014.

Gospodinova, Elitsa, Mario Angelov, and Taschko Nikolov. Differential Cryptoanalysis of Data Distributed Transmission System In MT&S-2013 Conference. Sofia: Defence Institute, 2014.