Okkhor-Diffusion: Class Guided Generation of Bangla Isolated Handwritten Characters Using Denoising Diffusion Probabilistic Model (DDPM). - Md. Mubtasim Fuad; A. Faiyaz; Noor Mairukh Khan Arnob; Muhammad Firoz Mridha; Aloke Kumar Saha; Zeyar Aung (IEEE Access, 2024)