Конахович, Г. Ф., В. Є. Курушкін, and В. В. Антонов. “Modem As a Part of Secured Radiotelephone Equipment for Aviation”. Ukrainian Scientific Journal of Information Security, vol. 21, no. 1, Mar. 2015, pp. 7-15, doi:10.18372/2225-5036.21.8298.