00660naa#a2200181#i#450# EN\INFRA-M\bibl\41240 /en/manage/index 20250206182219.4 2500-0489 20210125b2021####ek#y0engy0150####ca RU Investigation of the system for receiving calls via special communication lines Journal article Moscow INFRA-M Academic Publishing LLC. 2021 3 с. Journal article local Общие вопросы математических и естественных наук. 50 Gabdullin Rustem Bahytovich fht.editorum.ru /en/manage/index