If there are productive complex affixes among the causative affixes, then by means of them causatives can also (or only) be derived from intransitives.
Standardized
If there are productive complex affixes among the causative affixes, then by means of them causatives can also (or only) be derived from intransitives.
Affixes which tend to form causatives from transitives often have a more complicated structure (since they are combinations or reduplications of more simple affixes) than affixes which tend to form causatives from intransitives. (Nedjalkov & Sil’nickij 1973: 7)
Affixes which tend to form causatives from transitives often have a more complicated structure (since they are combinations or reduplications of more simple affixes) than affixes which tend to form causatives from intransitives. (Nedjalkov & Sil’nickij 1973: 7)