Managing references in doDOC is very easy.
INSERT REFERENCES
If you are in the Editor and want to search and add a reference proceed to:
1. Place the cursor in the document where you want to insert the reference.
2. Click Insert on the Menu Toolbar and then Reference OR click 
in the sidebar.
3. The References panel will appear.
3. Now, you are able to:
- Filter the references on the Library or on your document.
- Open the references manager to:
a) Search references in your library.
b) Search references in PubMed and/or in Scopus.
c) Import references (Important note: You can only use EndNote XML files or
BiB files).
4. After choosing the reference, you can edit (explanation below) or insert it.
5. After inserting a reference, the number of it will appear where you placed the cursor.
REMOVE REFERENCES
Option 1: Delete directly from Editor
If you are in the Editor and want to remove a citation from your document:
1. Place the cursor immediately after the citation you want to remove.
2. Press the backspace or delete key.
3. Your citation will be removed from the document.
Option 2: Using the References Panel
1. Click on the sidebar 
. The References panel will appear.
2. Click Remove on the reference you want to remove.
EDIT REFERENCES
If you are in the Editor and want to search and add a reference proceed to:
1. Click Insert on the Menu Toolbar and then Reference OR click on the sidebar . The References panel will appear.
2. Click Edit on the Reference you want to edit. The References Manager will appear and you are able to do it.
I have tried all the steps above, but I still cannot solve my issue...
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