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Spectrophotometric Determination of Paracetamol, Ibuprofen, and Caffeine in Novafen Capsules by Vierordt’s Method and Crammer’s Rule for Dissolving the Trinomial Equations. sjpas 2022, 4 (1), 33-42. https://doi.org/10.54153/sjpas.2022.v4i1.346.