1. Open the homepage of HowNet and click the "Advanced Search" function key.

2. In the page that opens, click the "Periodical" function key.

3. Check the "Core Journals" option and click the "Search" function key.

4. On the search results page, select the literature you need, and then click the "Export" function key.

5. On the export page, select "Reference Format" and click the "Export" function key to generate a retrieval report.