P. R. Manivannan, V. Ramaswamy, and S. Soundarrajan, “Severe multiorgan toxicity following low-dose copper sulfate poisoning in a patient with Psoriasis vulgaris on methotrexate: a case report”, Int J Res Med Sci, vol. 14, no. 9, pp. 4101–4104, Aug. 2026.