Where can I find the link of a worksheet that I added to my workbooks?
It's not possible to get the link from the workbook. You have to look for the original worksheet in "my workhseets" (if it is your own worksheet) or using the search box at the top of the page (if it is shared by other user).
The workbooks should not be used as a collection of favourite worksheets, because they are only accesible for registered students who enter the students' zone with their username and password. For this purpose, we recommend to add the worksheets to your "favourites".