Figueira, F., M. Matos, A. Nunes, M. Afonso, A. C. Rocha, J. Campelo, and T. Ferreira. “Considerations about Foxing Stains in Three Paper Collections Ranging from the 16th to the 20th Century”. Conservar Património, vol. 35, Nov. 2020, pp. 45-57, doi:10.14568/cp2019022.