These texts, as opposed to Aristotle's lost works, are technical philosophical treatises from within Aristotle's school.
ðiːz tˈɛksts, æz əpˈoʊzd tʊ ˈæɹɪstˌɑːɾəlz lˈɔst wˈɜːks, ɑːɹ tˈɛknɪkəl fˌɪləsˈɑːfɪkəl tɹˈiːɾɪzᵻz fɹʌm wɪðˌɪn ˈæɹɪstˌɑːɾəlz skˈuːl.