<?xml version="1.0"?>
<response><item key="0"><nothing>Georgii Sizykh, Sergei P. Roshchupkin, Victor V. Dubov, "Resonant Ultrarelativistic Electron&#x2013;Positron Pair Production by High-Energy Electrons in the Field of an X-ray Pulsar", Universe, vol. 6, pp. 132, 2020, [DOI: 10.3390/universe6090132] [IF: 2.28, SJR: 0.83]</nothing></item></response>
