Maternal Knowledge, Perceptions and Age-appropriate Coverage of Routine Immunization in Children under Five Years in Southern Sri Lanka. Asian Journal of Pharmacy, Nursing and Medical Sciences, [S. l.], v. 6, n. 1, 2018. Disponível em: https://ajouronline.com/index.php/AJPNMS/article/view/5187. Acesso em: 15 jan. 2026.