Lepp, M., T. Palts, P. Luik, K. Papli, R. Suviste, M. Säde, K. Hollo, V. Vaherpuu, and E. Tõnisson. “Troubleshooters for Tasks of Introductory Programming MOOCs”. The International Review of Research in Open and Distributed Learning, Vol. 19, no. 4, Sept. 2018, doi:10.19173/irrodl.v19i4.3639.