AL-SHAHER, Oday I.; AL-ASDI, Abbas A.; JAWAD, Haider K. Covid-19 in Pseudo BH-algebra. Journal of Kufa for Mathematics and Computer, Kufa, Najaf, IRAQ, v. 10, n. 1, p. 49–52, 2023. DOI: 10.31642/JoKMC/2018/100106. Disponível em: https://journal.uokufa.edu.iq/index.php/jkmc/article/view/12123. Acesso em: 29 aug. 2026.