{
  "source_id": "10.3176/phys.math.1969.1.01",
  "archive": "Estonian Academy Publishers archive (kirj.ee)",
  "publisher": "Estonian Academy Publishers",
  "journal": "Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics",
  "journal_original": "Известия Академии наук Эстонской ССР. Физика. Математика",
  "year": 1969,
  "volume": "18",
  "issue": "1",
  "pages": "3–13",
  "first_page": 3,
  "last_page": 13,
  "title": "ОБ ОПТИМИЗАЦИИ НА ДВУХ УРОВНЯХ",
  "title_en": null,
  "authors": [
    "Sulev Ulm"
  ],
  "language": "Russian",
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  "doi": "10.3176/phys.math.1969.1.01",
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  "license": "CC BY 4.0",
  "license_url": "http://creativecommons.org/licenses/by/4.0/",
  "license_evidence": "crossref license field (publisher policy page says CC BY-NC 4.0; see notes)",
  "license_notice": "Translated from Russian. Original: Sulev Ulm, “Об оптимизации на двух уровнях”, Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, 1969, vol. 18 no. 1, pp. 3–13, https://doi.org/10.3176/phys.math.1969.1.01. Published by Estonian Academy Publishers; license CC BY 4.0 (http://creativecommons.org/licenses/by/4.0/) as deposited with Crossref by the publisher (the publisher's policy page names CC BY-NC 4.0). Changes: translated into English.",
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  "record_source": "harvested 2026-10-14 from the publisher's API"
}