LiteFormer: A lightweight encoder-only Transformer for efficient financial time series forecasting across global stock indices. - Nguyen Quoc Anh; Tran Truong Tuan Phat; Ha Xuan Son; Thai Thi Thanh Nhan; Nguyen Ngoc Phien; Trung Phan Hoang Tuan; Ngan Nguyen Thi Kim (Eng. Appl. Artif. Intell., 2026)