Perspectives of the video medium

* * * *
Wetzel, C. Douglas, Radtke, Paul, H. and Stern, Hervey W. (1994) Instructional effectiveness of video media. Lawrence Erlbaum Associates, Publishers. USA.
Chapter 10 Perspective on Video Media

Mental Effort

* * * *
Wetzel, C. Douglas, Radtke, Paul, H. and Stern, Hervey W. (1994) Instructional effectiveness of video media. Lawrence Erlbaum Associates, Publishers. USA.
Chapter 8: Learning, Mental Effort and the Perception of Media.

Interactive video

* * * *
Wetzel, C. Douglas, Radtke, Paul, H. and Stern, Hervey W. (1994) Instructional effectiveness of video media. Lawrence Erlbaum Associates, Publishers. USA.
Chapter 5. Computer-Based Interactive Video

Dynamic Visual Presentations

* * * * *
Wetzel, C. Douglas, Radtke, Paul, H. and Stern, Hervey W. (1994) Instructional effectiveness of video media. Lawrence Erlbaum Associates, Publishers. USA.

Technical Issues

* * *
England, Elaine and Finney, Andy (2002). Managing Multimedia: Project Management for Web and Convergent Media. Book 2: Technical Issues. Pearson Education Limited. England.

Designing Minimalist Instruction

* * * *
Carroll, John, M. (1990).The Nurnberg Funnel: Designing Minimalist Instruction for Practical Computer Skills. Technical Communications, MIT Press, USA.

Technology, Open Learning and Distance Education

* * * * * 

Bates, Tony (1995). Technology, Open Learning and Distance Education. Routledge. Taylor and Francis Group. UK

Interface design

* * * *
England, Elaine and Finney, Andy (2002). Managing Multimedia: Project Management for Web and Convergent Media. Book 1: People and Processes. Pearson Education Limited. England.

Selecting media and Techniques

* * *
England, Elaine and Finney, Andy (2002). Managing Multimedia: Project Management for Web and Convergent Media. Book 1: People and Processes. Pearson Education Limited. England.

Virtual

I found Interesting the definition of virtual adduced in dictionary.com (the one that starts with "usage note").
Alberto Ramirez Martinell