<?xml version="1.0"?>
<response><item key="0"><nothing>Georgii Sizykh, Sergei P. Roshchupkin, Victor V. Dubov, "Resonant Effect of High-Energy Electron&#x2013;Positron Pairs Production in Collision of Ultrarelativistic Electrons with an X-ray Electromagnetic Wave", Universe, vol. 7, pp. 210, 2021, [DOI: 10.3390/universe7070210] [IF: 2.81, SJR: 0.68]</nothing></item></response>
