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Warning: file_get_contents(): Failed to enable crypto in /www/wwwroot/lepang/lp/htmls/common/api/yh.php on line 40
Warning: file_get_contents(https://api.crossref.org/works/10.1109/4.924854): failed to open stream: operation failed in /www/wwwroot/lepang/lp/htmls/common/api/yh.php on line 40