LEEKRIANGKRAI, U.; LAITIP, N.; TAEBUNPAKUL, S.; TANGPAISARNKUL, N. Development of Thailand reference material for determining some elements in green chiretta (Andrographis paniculata) powder. Bulletin of Applied Sciences, Bangkok, Thailand, v. 12, n. 1, p. 15–26, 2023. DOI: 10.60136/bas.v12.2023.399. Disponível em: https://ph03.tci-thaijo.org/index.php/BAS/article/view/BAS_Vol12No1_p15-26. Acesso em: 2 sep. 2026.