@article{Liu_2015 author = {Ch. Liu and A. Yu. Panchenko and Mykola I. Slipchenko}, title = {ATMOSPHERIC RADIO ACOUSTIC SOUNDING SYSTEMS WITH CONTROLLED ARRAY ANTENNAS. PART 2: DIFFRACTION PROBLEM}, journal = {Telecommunications and Radio Engineering}, issn = {0040-2508}, year = {2015}, volume = {74}, number = {19}, pages = {1745--1753} }