{
  "source_id": "10.3176/phys.math.1987.3.04",
  "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": 1987,
  "volume": "36",
  "issue": "3",
  "pages": "261–268",
  "first_page": 261,
  "last_page": 268,
  "title": "КАЧЕСТВЕННОЕ ИССЛЕДОВАНИЕ МОДЕЛЬНОГО УРАВНЕНИЯ ЛЬЕНАРА ДЛЯ ОПИСАНИЯ АПЕРИОДИЧЕСКОГО ПРОФИЛЯ УЕДИНЕННОЙ ВОЛНЫ",
  "title_en": null,
  "authors": [
    "Jüri Engelbrecht",
    "T. Tobias †",
    "Anu Uus"
  ],
  "language": "Russian",
  "language_evidence": "crossref language=ru + Cyrillic (Russian) title",
  "doi": "10.3176/phys.math.1987.3.04",
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  "license": "CC BY 4.0",
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  "license_notice": "Translated from Russian. Original: Jüri Engelbrecht, T. Tobias †, Anu Uus, “Качественное исследование модельного уравнения льенара для описания апериодического профиля уединенной волны”, Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics, 1987, vol. 36 no. 3, pp. 261–268, https://doi.org/10.3176/phys.math.1987.3.04. 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"
}