Hello Stefan,
There are two online resources that supply abstracts:
1) New Testament Abstracts
2) Religious and Theological Abstracts
Both can be found via the library website. Click on:
1) the "Research & Resources" link, then
2) the "Databases A-Z" link
You will find both in the alphabetical list. Search to find your articles by author and title. They will be accompanied by indexer supplied abstracts.
Let me know if you have any further questions or experience any problems.
Bruce