How to fetch Portal/System comments using Rest Api

Hi
In my scenario, Various users add comments to a task.
These comments can be viewed by Selecting the case and then view case details.
In addition there are System comments there as well.

Now I want to retrieve these comments and display them in a page.
Now this page is outside the portal.This is an Application page.

I believe that I need to use Web Rest API to retrieve these comments (Portal / system ) .

Kindly Suggest a method to do the following .

Regards

Use REST CaseComment, see here http://documentation.bonitasoft.com/?page=bpm-api and use find

regards
Seán

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