Christiansen, Thomas; Cotte, Marine; de Nolf, Wout; Mouro, Elouan; Reyes-Herrera, Juan; de Meyer, Steven; Vanmeert, Frederik; Salvadó, Nati; Gonzalez, Victor «Insights into the composition of ancient Egyptian red and black inks on papyri achieved by synchrotron-based microanalyses». PNAS, 117, 45, 2020, pàg. 27825–27835. Bibcode: 2020PNAS..11727825C. DOI: 10.1073/pnas.2004534117. PMC: 7668004. PMID: 33106396.
Christiansen, Thomas; Cotte, Marine; de Nolf, Wout; Mouro, Elouan; Reyes-Herrera, Juan; de Meyer, Steven; Vanmeert, Frederik; Salvadó, Nati; Gonzalez, Victor «Insights into the composition of ancient Egyptian red and black inks on papyri achieved by synchrotron-based microanalyses». PNAS, 117, 45, 2020, pàg. 27825–27835. Bibcode: 2020PNAS..11727825C. DOI: 10.1073/pnas.2004534117. PMC: 7668004. PMID: 33106396.
ifes.org
Anne-Sofie Holm Gerhard, Melika Atic, Panto Letic and Peter Erben. «Indelible Ink in Elections» p. 20–22, 2019. Arxivat de l'original el 2019-11-08.
Christiansen, Thomas; Cotte, Marine; de Nolf, Wout; Mouro, Elouan; Reyes-Herrera, Juan; de Meyer, Steven; Vanmeert, Frederik; Salvadó, Nati; Gonzalez, Victor «Insights into the composition of ancient Egyptian red and black inks on papyri achieved by synchrotron-based microanalyses». PNAS, 117, 45, 2020, pàg. 27825–27835. Bibcode: 2020PNAS..11727825C. DOI: 10.1073/pnas.2004534117. PMC: 7668004. PMID: 33106396.