e.g. an article is well written and it has 2-3 outgoing links to examples and sources. A visitor, while reading the article, clicks on those links and hits backpage to come back to your site. Does that count as a bounce since the reader visited your site and then left it(even if they returned)?
Would opening external links in a new window lower the bounce rate? Time on site is also important, if they click a link within 10 seconds and come back to finish reading you're still going to get the "0-10 seconds" rating for that visitor.
How would you best ensure that your bounce rate and time on site rating are not impacted by links to sources within articles? This seems like an question with an obvious answer but it's got its nuances, such as the mystery on how Google handles this type of behavior.