Techniken und Einsatzszenarien für Podcasts in der universitären Lehre. - Markus Ketterl; Tim Schmidt; Robert Mertens; Karsten Morisse (DeLFI Workshops, 2006)

Interactive Content Overviews for Lecture Recordings. - Robert Mertens 002; Markus Ketterl; Oliver Vornberger (ISM, 2006)

Gibt es mobiles Lernen mit Podcasts? - Wie Vorlesungsaufzeichnungen genutzt werden. - Leonore Schulze; Markus Ketterl; Clemens Gruber; Kai-Christoph Hamborg (DeLFI, 2007)

Vector graphics for web lectures: experiences with Adobe Flash 9 and SVG. - Markus Ketterl; Robert Mertens 002; Oliver Vornberger (Interact. Technol. Smart Educ., 2007)

The virtPresenter lecture recording system: Automated production of web lectures with interactive content overviews. - Robert Mertens 002; Markus Ketterl; Oliver Vornberger (Interact. Technol. Smart Educ., 2007)

Social selected learning content out of web lectures. - Markus Ketterl; Johannes Emden; Jörg Brunstein (Hypertext, 2008)

Web Lectures and Web 2.0. - Markus Ketterl; Robert Mertens 002; Oliver Vornberger (ISM, 2008)

Opencast, Opencast Community und Opencast Matterhorn - eine Open Source Lösung für die Erzeugung, das Management und die Nutzung audiovisueller Inhalte an Hochschulen. - Markus Ketterl; Olaf A. Schulte (DeLFI Workshops, 2009)

Opencast Matterhorn: A Community-Driven Open Source Solution for Creation, Management and Distribution of Audio and Video in Academia. - Markus Ketterl; Olaf A. Schulte; Adam Hochman (ISM, 2009)

Turning Web Lectures into User Generated Adaptive Multimedia. - Robert Mertens 002; Markus Ketterl; Oliver Vornberger (ISM, 2009)

Bringing Web 2.0 to web lectures. - Markus Ketterl; Robert Mertens 002; Oliver Vornberger (Interact. Technol. Smart Educ., 2009)

History-Aware User Awareness in Web Lectures. - Markus Ketterl; Robert Mertens 002; Johannes Emden; Oliver Vornberger (ISM, 2010)

Using Social Navigation for Multimedia Content Suggestion. - Markus Ketterl; Johannes Emden; Oliver Vornberger (ICSC, 2010)

Opencast Matterhorn: A community-driven open source software project for producing, managing, and distributing academic video. - Markus Ketterl; Olaf A. Schulte; Adam Hochman (Interact. Technol. Smart Educ., 2010)

Social navigation in web lectures: a study of virtPresenter. - Robert Mertens; Markus Ketterl; Peter Brusilovsky (Interact. Technol. Smart Educ., 2010)

The Tempo-Structural Fisheye Slider for Navigation in Web Lectures. - Robert Mertens 002; Sebastian Pospiech; Christoph Wiesen; Markus Ketterl (ISM, 2011)

TSF-Slider: Combining Time- and Structure-Based Media Navigation in One Navigation Component. - Sebastian Pospiech; Robert Mertens 002; Martin E. Muller; Markus Ketterl (ISM, 2011)

OpenCast Matterhorn 1.1: reaching new heights. - Christopher A. Brooks 001; Markus Ketterl; Adam Hochman; Josh Holtzman; Judy Stern; Tobias Wunden; Kristofor Amundson; Greg Logan; Kenneth Lui; Adam McKenzie; Denis Meyer; Markus Moormann; et al. (ACM Multimedia, 2011)

Enabling user to user interactions in web lectures with history-aware user awareness. - Markus Ketterl; Robert Mertens 002; Christoph Wiesen; Oliver Vornberger (Interact. Technol. Smart Educ., 2011)

Graphical Programming Environments for Educational Robots: Open Roberta - Yet Another One? - Beate Jost; Markus Ketterl; Reinhard Budde; Thorsten Leimbach (ISM, 2014)

Guest editorial. - Markus Ketterl; Christopher A. Brooks 001; Florian Schimanke (Interact. Technol. Smart Educ., 2014)

Scalable Multimedia Learning: From local eLectures to global Opencast - Markus Ketterl (2014)

An Adopter Centric API and Visual Programming Interface for the Definition of Strategies for Automated Camera Tracking. - Benjamin Wulff; Andrew Wilson; Beate Jost; Markus Ketterl (ISM, 2015)

LEARNMINER - Advanced Analytics for eLearning. - Christian Bauckhage; Markus Ketterl; Ulrich Nütten (ERCIM News, 2015)