{
  "source_id": "10.3176/phys.math.1990.1.10",
  "archive": "Estonian Academy Publishers archive (kirj.ee)",
  "publisher": "Estonian Academy Publishers",
  "journal": "Proceedings of the Estonian Academy of Sciences. Physics. Mathematics",
  "journal_original": null,
  "year": 1990,
  "volume": "39",
  "issue": "1",
  "pages": "69–74",
  "first_page": 69,
  "last_page": 74,
  "title": "ФОРМИРОВАНИЕ СВЕРХКОРОТКИХ СВЕТОВЫХ ИМПУЛЬСОВ ФИЛЬТРАМИ, СИНТЕЗИРОВАННЫМИ ВЫЖИГАНИЕМ СПЕКТРАЛЬНЫХ ПРОВАЛОВ",
  "title_en": null,
  "authors": [
    "Heiki Sõnajalg"
  ],
  "language": "Russian",
  "language_evidence": "Cyrillic (Russian) title as deposited; Crossref language=en is unreliable for this publisher (PDF spot-check: Cyrillic-titled items tagged en/de have Russian body text)",
  "doi": "10.3176/phys.math.1990.1.10",
  "landing_page": "https://kirj.ee/proceedings-of-the-estonian-academy-of-sciences-physics-mathematics-publications/?filter[year]=1990&filter[issue]=1448&filter[publication]=12384",
  "pdf_url": "https://kirj.ee/wp-content/plugins/kirj/pub/phys.math-1-1990-69-74_20230221182157.pdf",
  "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: Heiki Sõnajalg, “Формирование сверхкоротких световых импульсов фильтрами, синтезированными выжиганием спектральных провалов”, Proceedings of the Estonian Academy of Sciences. Physics. Mathematics, 1990, vol. 39 no. 1, pp. 69–74, https://doi.org/10.3176/phys.math.1990.1.10. 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_url": "https://api.crossref.org/works/10.3176/phys.math.1990.1.10",
  "record_source": "harvested 2026-10-14 from the publisher's API"
}