Starzhevsky (trans. by our illustrious Bart!) in the members area is a short treatise of some use; all the messer stuff works great with cutlass/falchion/etc., so see Meyer, Wallerstein/Durer, and others with that--also, escrima can be adapted for it.
Hope this helps? It's short and doesn't cover much but the basics, but it's interesting, I think. It's more contemporary than most of our other materials but I think it is (as the Navy would nodoubt do...) just an updated edition of a sailor's manual that likely has been in a similar form for hundreds of years.
There are probably some older writings, but one problem is that the cutlass became widspread in the era of the height of the smallsword among masters of defence in the late early modern period. I would think though that messer and dussack techniques would translate well. It was distinctly a lower class weapon.