00486naa#a2200169#i#450# EN\\bibl\14596 20241012091145.6 1609-3178 20151215b2015####ek#y0engy0150####ca RUS RU Features of Concrete Deep Foundations Integrity Ultrasonic Testing in Russia Journal article Saint-Petersburg LLC SVEN 2015 4 с. Journal article local Kharitonov Aleksandr naukaru.ru