Some of the references you see will be to journal articles. Here's an example:
Obladen, M. (2012). Bad milk, Part 1: antique doctrines that impeded breastfeeding. Acta Paediatrica. vol. 101, issue 11, pp1102-1104.
Clues to understanding:
Tips for searching for journal articles on Primo:
To search for the journal you will need the journal title in full. You cannot search for the abbreviated title!
Use the instructions on the How to find journal articles page.