Servetus, Michael (1553). Christianismi restitutio … (in Latin). Vienne, France: Baltasar Arnoullet. p. 170. Available at: Biblioteca Digital Hispánica – Biblioteca Nacional de España From p. 170: "Fit autem communicatio hæc non per parietem cordis medium, ut vulgo creditur, sed magno artificio a dextro cordis ventriculo, longo per pulmones ductu, agitatur sanguis subtilis: a pulmonibus præparatur, flavus efficatur: et a vena arteriosa, in arteriam venosam transfunditur." (However this communication [of blood from the right to the left ventricle] occurs not through the middle wall of the heart, as is commonly believed, but by a great mechanism, the subtle blood is driven from the right ventricle of the heart, [and] at length led through the lungs; it is made ready in the lungs, is made yellowish, and is [thus] transferred from the pulmonary artery into the pulmonary vein.)
books.google.com
Andrew M. T. Dibb, Servetus, Swedenborg and the Nature of God, University Press of America, 2005, p. 93. Online at Google Book Search
González Echeverría, Francisco Javier (2017). Miguel Servet y los impresores lioneses del siglo XVI, PhD dissertation on Modern History, Spanish National Distance University (UNED). Dissertation director: Carlos Martínez Shaw, Modern History prof. at UNED & Numerary member at the Spanish Royal Academy of History, chair #32. Qualification: unanimous Cum Laude. Madrid: Spanish National Distance University (UNED), pp. 263–267.