J. A. Gonçalves and A. L. Santos,  "Jinter: A hint generation system for Java exercises", in ITiCSE 2023: Proc. of the 2023 Conf. on Innovation and Technology in Computer Science Education, Laakso, M.-J., and Monga, M., Ed., Turku Finland, Association for Computing Machinery, 2023, vol. 1, pp. 375-381