For citations:

Andreev N.K., Malatsion A.S. Multi-frequency acoustic method and equipment for cement bond log of wells based on one-sided excitation and reception of elastic waves from the top of the well. Power engineering: research, equipment, technology. 2016;(5-6):116-122. (In Russ.) https://doi.org/10.30724/1998-9903-2016-0-5-6-116-122