Nachleben (German for 'after-life') denotes the reception history of an author or text.
The following authors/works, which are listed in chronological order, refer to Perptua and/or Felicity before the year 1100.
This list is drawn from Appendix A of Erin Ann Ronsse's dissertation beginning on p. 207 (Rhetoric of the Matyrs: Transmission and Reception History of the 'Passion of Sts. Perpetua and Felicity.' Dissertation, Univ. of Victoria, 2008). Here is the PDF.
NB: Many of these sources are linked to the relevant text, image, or Wikipedia page.