MC-OCR Challenge 2021: A Multi-modal Approach for Mobile-Captured Vietnamese Receipts Recognition. - Bao Hieu Tran; Duc Viet Hoang; Nguyen Manh Hiep; Pham Ngoc Bao Anh; Hoang Gia Bao; Nguyen Duc Anh; Bui Hai Phong; Thanh-Hung Nguyen; Phi Le Nguyen; Thi-Lan Le (RIVF, 2021)