N. DJIEDEU. Universal Standard Calendar: A Periodical and Temporal Indicator for the Statistical Study of Phenomena Evolving with Time. Newest Updates in Physical Science Research Vol. 10, [S. l.], p. 23–36, 2021. DOI: 10.9734/bpi/nupsr/v10/10172D. Disponível em: https://stm.bookpi.org/NUPSR-V10/article/view/2375. Acesso em: 4 jun. 2026.