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2. 11th Report of the European Gas Pipeline Incident Data Group (period 1970–2019) December 2020. URL:https://www.egig.eu/reports.
3. UKOPA Pipeline Product Loss Incidents and Faults Report (1962–2020). Report Reference: February 2020. URL:https://www.ukopa.co.uk/published-documents/ukopa-reports/
4. PHMSA. Pipelines and Hazardous Materials Safety Administration. Pipeline Incident 20 Year Trends. URL:https://www.phmsa.dot.gov/data-and-statistics/pipeline/pipeline-incident-20-year-trends
5. Godovoj otchet AO «IntergazCentral'najaAzija» za 2019 g. – Nur-Sultan. – 2020. – 78 с. URL: https://intergas.kz/ru/reports/88.