00481naa#a2200169#i#450# EN\INFRA-M\bibl\2135 20241226193335.4 2308-4898 20140303b2014####ek#y0engy0150####ca RUS RU Double-Tap in a Beam of Second Order Surfaces Journal article Moscow INFRA-M Academic Publishing LLC. 2014 5 с. Journal article local Korotkiy Viktor Anatol'evich zh-szf.ru