LIU, Jiachen. The Recurrence and Transience of Random Walks. Highlights in Science, Engineering and Technology, [S. l.], v. 94, p. 431–436, 2024. DOI: 10.54097/mdb42w42. Disponível em: https://drpress.org/ojs/index.php/HSET/article/view/20688. Acesso em: 11 nov. 2025.