G. L. Salvagno, „Anti-spike S1 IgA, anti-spike trimeric IgG, and anti-spike RBD IgG response after BNT162b2 COVID-19 mRNA vaccination in healthcare workers: IgG and IgA response after BNT162b2 mRNA vaccination“, J Med Biochem, vol 40, izd. 4, str. 327–334, Juni 2021, doi: 10.5937/jomb0-32373.