Nguyen, Xuan Truc, Thi Hong Phuc Nguyen, Van Tuyen Ong, and Quoc Tuyen Luong. 2024. “ω-Cover, K-Cover and Related Spaces on the Pixley-Roy PR[X]”. Dong Thap University Journal of Science - Natural Sciences Issue 14 (5):60-66. https://doi.org/10.52714/dthu.14.5.2025.1500.