Fuzzy semi-Markovian stochastic model for single-unit system with repairman arrival delay under Lindley lifetime distribution using bell-shaped membership function. Journal of the Nigerian Society of Physical Sciences, [S. l.], v. 8, n. 3, p. 3438, 2026. DOI: 10.46481/jnsps.2026.3438. Disponível em: https://journal.nsps.org.ng/index.php/jnsps/article/view/3438. Acesso em: 29 jun. 2026.