Font Type: Helping Us Understand Information
http://www.senseandusability.com/index.php?view=article&catid=34%3Atechnical-communication&id=48%3Afont-type&option=com_content&Itemid=61

Lanier, Clinton R.
sense and usability
2007

Abstract:

You wouldn't think that something as seemingly insignificant as the type of font you use could be so important, but it really is. As one of the goals of technical communication, we try our best to make information easy to find and understand. The type of font being used has a lot to do with this goal.