Dissertationis, de orthoëpia & orthographia linguae fennicae, pars posterior. Cujus sectionem priorem, cons. ampl. fac. philos. in Imp. Acad. Aboënsi. Publico offerunt examini Gustavus Renvall, philos. mag. [et] collega scholae cath. Aboëns. et Carolus Andreas Ignatius stip. publ. Aboënsis. In auditorio medico die IV Junii MDCCCXI. horis a. m. consvetis.
Frenckell, Johan Christopher II (kirjapaino, Turku, 1785-1814); Ignatius, Bengt Jakob 1761-1827,; Ignatius, Carolus Andreas 1790-1828,; Renvall, Gustaf 1781-1841,
1811, Johan Christopher Frenckell II (1785-1814), Turku: sivu 1 19.04.2019