The Problem of Tacit Knowledge - Is It Possible to Externalize Tacit Knowledge? - Ilkka Virtanen (EJC, 2008)

How Tacit Is Tacit Knowledge? - Ilkka Virtanen (ER PhD Colloquium, 2009)

Interaction and Student Dropout in Massive Open Online Courses. - Markus Harju; Teemu Leppänen; Ilkka Virtanen (CoRR, 2018)