Maria, V., D. Aspasia, I. Philia, and G. Ioannis. “Developing Responsibility through Action Research: Implementing Hellison’s Model As a Whole-School Approach in Primary Education”. International Journal of Physical Education, Fitness and Sports, vol. 15, no. 1, Feb. 2026, pp. 28-50, doi:10.54392/ijpefs2613.