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http://alternative.am/wp-content/uploads/2017/03/%D5%8D%D5%B5%D5%B8%D6%82%D5%A6%D5%A5%D5%BF%D5%A1-%D5%84%D4%B1%D5%90%D5%8F%D4%BB%D5%90%D5%88%D5%8D%D5%85%D4%B1%D5%86-%D4%B1%D6%80%D6%87%D5%AB%D5%AF-%D5%8D%D4%B1%D5%90%D4%B3%D5%8D%D5%85%D4%B1%D5%86-%D4%BC%D5%B8%D6%82%D5%AF%D5%A1%D5%BD%D5%AB-%D5%BA%D5%A1%D6%80%D5%A1%D5%A4%D5%B8%D6%84%D5%BD%D5%A8.-%D5%A4%D5%A5%D5%BA%D5%AB-%D5%80%D5%A1%D5%B5%D5%A1%D5%BD%D5%BF%D5%A1%D5%B6-%D5%AF%D5%A1%D5%BA%D5%AB%D5%BF%D5%A1%D5%AC%D5%AB-%D5%A9%D5%B8%D6%82%D5%B5%D5%AC-%D5%B6%D5%A5%D6%80%D5%B0%D5%B8%D5%BD%D6%84%D5%AB-%D5%BA%D5%A1%D5%BF%D5%B3%D5%A1%D5%BC%D5%B6%D5%A5%D6%80%D5%A8.pdf

Wikipedia: Lucas paradox