@article{IOI2019,
    author="Lodi, Michael and Malchiodi, Dario and Monga, Mattia and Morpurgo, Anna and Spieler, Bernadette",
    title="Constructionist Attempts at Supporting the Learning of Computer Programming: A Survey",
    journal="Olympiads in Informatics",
    volume="13",
    pages="99–121",
    year=2019},