HASAN HAMEED, Ahmed; ANNON MOUSA, Ekhlas; ABDULLAH HAMAD, Abdulsattar. Upper Limit Superior and Lower Limit Inferior of Soft Sequences. International Journal of Engineering and Technology, [S. l.], v. 7, n. 4.7, p. 306–310, 2018. DOI: 10.14419/ijet.v7i4.7.20567. Disponível em: https://sciencepubco.com/index.php/IJET/article/view/20567.. Acesso em: 11 aug. 2025.