I'm working on a chemistry paper about the Belousov-Zhabotinsky-reaction (a chemical oscillator).
On of my sources is this paper from the AIMS. In the paper the authors have a few figures, especially figure 2 (you can view it on the website). If permitted by the copyright, I would like to include the figure.
I've no idea how the copyright is regulated with such papers. The AIMS website provides even an option to download the full-size figure.
What is the copyright for DOI-papers (by the AIMS)? And how can I determine such a thing the next time (if it has an DOI)?
For this specific case, is it allowed to include the figure, on the condition of correct reference?