Wulandari, R., D. Jonas, and N. F. Alwarits. “Design of Expert System Application for Android-Based DSLR Camera Damage Diagnosis”. IAIC Transactions on Sustainable Digital Innovation (ITSDI), vol. 1, no. 2, Dec. 2019, pp. 99-107, doi:10.34306/itsdi.v1i2.19.