The relationships between higher order thinking skills, cognitive density, and social presence in online learning

Lee, Sangmin-Michelle. (2014). The relationships between higher order thinking skills, cognitive density, and social presence in online learning. The Internet and Higher Education, 21(), 41–52. doi:10.1016/j.iheduc.2013.12.002

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research