Papageorgiou, Charalabos, et al. “Time Perception through the Processing of Verb Tenses: An ERP Study Regarding Mental Time Travel”. Archives of Clinical and Biomedical Research, vol. 5, no. 6, Nov. 2021, pp. 835-5, https://fortunejournals.org/ojs/index.php/acbr/article/view/14873.