00761naa#a2200205#i#450# EN\\bibl\81904 20241224062540.2 2412-9186 20181225b2018####ek#y0engy0150####ca RUS RU To the question of rail line maximum length determining at normal minimum value of insulation resistance in the function of the signal frequency of the rail circuit Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2018 14 с. Journal article local Прочие устройства СЦБ. 656.259 RUS Leushin V B Smirnova L B Yusupov R R atjournal.ru