JURADO, Marco Antonio Roca; CASTAÑEDA, Helen Margiori Mengoa. Regulation In Procurement Of Goods And Services For Amounts Up To 8 Uit Tax Units And Efficiency In Purchases Of The Social Health Security - Essalud, 2022. Journal of Neonatal Surgery, Lahore, Pakistan, v. 14, n. 13S, p. 670–678, 2025. DOI: 10.52783/jns.v14.3342. Disponível em: https://jneonatalsurg.com/index.php/jns/article/view/3342. Acesso em: 30 may. 2026.