Those works that have survived are in treatise form and were not, for the most part, intended for widespread publication; they are generally thought to be lecture aids for his students.
ðoʊz wˈɜːks ðæt hæv sɚvˈaɪvd ɑːɹ ɪn tɹˈiːɾɪz fˈɔːɹm ænd wɜː nˈɑːt, fɚðə mˈoʊst pˈɑːɹt, ɪntˈɛndᵻd fɔːɹ wˈaɪdspɹɛd pˌʌblɪkˈeɪʃən; ðeɪ ɑːɹ dʒˈɛnɚɹəli θˈɔːt təbi lˈɛktʃɚɹ ˈeɪdz fɔːɹ hɪz stˈuːdənts.