↑Davis 1989, p. 43f; The original Latin in Mansi 1762, p. 301: quod tandem aequitas in Symmacho invenit, et cognitio veritatis
↑Despite Laurentius being classed as an antipope, it is his portrait that continues to hang in the papal gallery in the Church of St. Paul's, not that of Symmachus.
↑Martyrologium Romanum: ex Decreto Sacrosancti oecumenici Concilii Vaticani II instauratum auctoritate Ioannis Pauli P.P. II promulgatum, Romae 2001, ISBN 8820972107