Ade Setiawan, Hermawan Syahputra, Yulita Molliq Rangkuti, Zulfahmi Indra, and Kana Saputra S, “Voice Deepfake Detection Using Spectrogram Features and Mel-Frequency Cepstral Coefficients with a Combination of Convolutional Neural Network and Recurrent Neural Network”, j. of artif. intell. and eng. appl., vol. 5, no. 3, pp. 4743–4754, Jun. 2026.