The evolution of the surgical mask (1997)
pubmed.ncbi.nlm.nih.gov
pubmed.ncbi.nlm.nih.gov
[1] https://pubmed.ncbi.nlm.nih.gov/5333967/
[2] https://pubmed.ncbi.nlm.nih.gov/14438122/
By the way, in the literature on surgical masks, I was surprised by the total absence of references to research in France and the USSR. I would appreciate if anyone could point to surveys of mask research in those countries (in French or Russian are fine).