Warning: Use of undefined constant MER_ERROR_ARTICLE_NOT_FOUND - assumed 'MER_ERROR_ARTICLE_NOT_FOUND' (this will throw an Error in a future version of PHP) in /var/www/vhosts/mer.fem.sumdu.edu.ua/httpdocs/command/ViewArticleCommand.php on line 30 The International Scientific Journal 'Mechanism of Economic Regulation'