Piombino, Pasquale, Umberto Committeri, Giovanna Norino, Luigi Angelo Vaira, Stefania Troise, Fabio Maglitto, Domenico Mariniello, Giacomo De Riu, and Luigi Califano. “Facing COVID-19 Pandemic: Development of Custom-Made Face Mask With Rapid Prototyping System”. The Journal of Infection in Developing Countries 15, no. 01 (January 31, 2021): 51-57. Accessed October 18, 2021. https://jidc.org/index.php/journal/article/view/33571145.