KANNIKA KONGSAKORN; VICHIAN LAOHAKOSOL; RUJA ARUNBANJERDKUL. Factorial Series and Partial Sums Satisfying the Same Difference Equations. Agriculture and Natural Resources, Bangkok, Thailand, v. 21, n. 1, p. 68–74, 1987. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/242583. Acesso em: 18 sep. 2026.