Doewes, R. I., I. Nuryadin, S. Hendarto, and S. K. Purnama. “Development of Boccia Throw Test Instrument for Athletes With Cerebral Palsy”. Journal of Intellectual Disability - Diagnosis and Treatment, vol. 10, no. 2, Apr. 2022, pp. 108-13, doi:10.6000/2292-2598.2022.10.02.5.