Amandine Striebig, Les poisons utilisés dans les romans d’Agatha Christie (thèse d'exercice), (lire en ligne), II. Les poisons végétaux - les alcaloïdes, chap.7 («L'opium»).
(en) Samira Alinejad, Jan Aaseth, Mohammad Abdollahi et Hossein Hassanian-Moghaddam, «Clinical Aspects of Opium Adulterated with Lead in Iran: A Review», Basic & Clinical Pharmacology & Toxicology, vol.122, no1, , p.56–64 (DOI10.1111/bcpt.12855, lire en ligne, consulté le ).
«Application of screening tests for everyone with non-specific signs and symptoms like abdominal pain, constipation, irritability and anaemia is highly recommended.»
(en) Samira Alinejad, Jan Aaseth, Mohammad Abdollahi et Hossein Hassanian-Moghaddam, «Clinical Aspects of Opium Adulterated with Lead in Iran: A Review», Basic & Clinical Pharmacology & Toxicology, vol.122, no1, , p.56–64 (DOI10.1111/bcpt.12855, lire en ligne, consulté le ).
«Application of screening tests for everyone with non-specific signs and symptoms like abdominal pain, constipation, irritability and anaemia is highly recommended.»