Barnes 2003,第xv頁 clarifies that the Isagoge "[was] not an Introduction to the Categories, rather "[since it was] an introduction to the study of logic, [it] was... an introduction to philosophy--and hence accidentally an introduction to the Categories." Barnes, Jonathan. Porphyry: Introduction. Oxford: Clarendon. 2003 [2020-02-24]. (原始内容存档于2020-01-05).
For Porphyry's dates, place of birth and philosophical school, see Barker 2003,第1226–1227頁. Sarton 1936,第429–430頁 identifies Transjordania as Porphyry's place of birth. Barker, A. Porphyry. Hornblower, S.; Spawforth, A. (编). Oxford Classical Dictionary revised 3rd. 2003: 1226–1227. Sarton, G. The Unity and Diversity of the Mediterranean World. Osiris. 1936, 2: 406–463. doi:10.1086/368462.
Digeser 1998. Digeser, Elizabeth DePalma. Lactantius, Porphyry, and the Debate over Religious Toleration. Journal of Roman Studies. 1998, 88: 129–146. ISSN 0075-4358. doi:10.2307/300808.
Barnes 2003,第xv頁 clarifies that the Isagoge "[was] not an Introduction to the Categories, rather "[since it was] an introduction to the study of logic, [it] was... an introduction to philosophy--and hence accidentally an introduction to the Categories." Barnes, Jonathan. Porphyry: Introduction. Oxford: Clarendon. 2003 [2020-02-24]. (原始内容存档于2020-01-05).
Digeser 1998. Digeser, Elizabeth DePalma. Lactantius, Porphyry, and the Debate over Religious Toleration. Journal of Roman Studies. 1998, 88: 129–146. ISSN 0075-4358. doi:10.2307/300808.