Integration with externals systems and import docs

How may I integrate Bonita with any other external system?
May I import docs to Bonita and how I do that?

Two very broad questions to which both are yes…

For part 1 - you need REST see here: http://documentation.bonitasoft.com/product-bos-sp/rest-api

For Part 2 - depends on what you mean by import and your process needs… but see here: http://documentation.bonitasoft.com/documents-0

regards

I mean like import form that i have in other systems, bills, docs like those.
So many thanks.