R. Duque, L. Bollen, A. Anjewierden, C. Bravo: Automating the Analysis of Problem-solving Activities in Learning Environments: the Co-Lab Case Study /jucs_18_10/automating_the_analysis_of
F. Jurado, A.I. Molina, M.A. Redondo, M. Ortega, A. Giemza, L. Bollen, H.U. Hoppe: Learning to Program with COALA, a Distributed Computer Assisted Environment /jucs_15_7/learning_to_program_with
M. Jansen, L. Bollen, N. Baloian, H.U. Hoppe: Using Cloud Services to Develop Learning Scenarios from a Software Engineering Perspective /jucs_19_14/using_cloud_services_to