UMAIR AWAN, U. A. Historical Theories. sourcecoder, Gujranwala, Pakistan, v. 3, n. 3, p. 01–06, 2022. DOI: 10.47205/makhz.2022(3-III)1. Disponível em: https://ojs.sourcecoder.tk/journal/article/view/80. Acesso em: 6 dec. 2025.