To do on your own:
Open Source 1, click PDF to see the full article; read a little bit of it (the abstract section is a good place to start); scroll through the rest, notice characteristics (length could be one) that might help you determine what type of article you're looking at. Use Google to learn more about the author or publication if appropriate. Ask yourself:
This work is licensed under a Creative Commons Attribution-NonCommercial 2.0 Generic License.