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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">mrisel</journal-id><journal-title-group><journal-title xml:lang="en">Magnetic Resonance in Solids</journal-title><trans-title-group xml:lang="ru"><trans-title>Magnetic Resonance in Solids</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2072-5981</issn><publisher><publisher-name>Kazan Federal University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/mrsej-24303</article-id><article-id custom-type="elpub" pub-id-type="custom">mrisel-274</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>To the history of EPR discoveryy</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Dooglav</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kazan 420008</p></bio><email xlink:type="simple">Alexander.Dooglav@kpfu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Larionov</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kazan 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Vagapova</surname><given-names>F. R.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kazan 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Kazan Federal University</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>21</day><month>01</month><year>2025</year></pub-date><volume>26</volume><issue>3</issue><elocation-id>24303 (8 pp.)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Dooglav A.V., Larionov A.L., Vagapova F.R., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Dooglav A.V., Larionov A.L., Vagapova F.R.</copyright-holder><copyright-holder xml:lang="en">Dooglav A.V., Larionov A.L., Vagapova F.R.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.mrsej.ru/jour/article/view/274">https://www.mrsej.ru/jour/article/view/274</self-uri><abstract><p>The circumstances that contributed to the discovery of the EPR phenomenon by E.K. Zavoisky are analyzed. The emphasis is made on the applying of magnetic field modulation</p></abstract><kwd-group xml:lang="en"><kwd>EPR discovery</kwd><kwd>Zavoisky</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Gorter C.J. Physics today 76, 76 (1967)</mixed-citation><mixed-citation xml:lang="en">Gorter C.J. Physics today 76, 76 (1967)</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Gorter C.J. Physica 3, 995 (1936)</mixed-citation><mixed-citation xml:lang="en">Gorter C.J. Physica 3, 995 (1936)</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Pound R.V. Rev. Mod. Phys. 71, S54 (1999)</mixed-citation><mixed-citation xml:lang="en">Pound R.V. Rev. Mod. 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