I found relevant results in a database or NJSL Discovery, but why do some articles not have an access link? How do I access these articles?
Some searches can lead to a description of an article (also known as an "abstract") without a link to access it directly. Some databases are a mix of full text and abstracts; some are abstract-only.
If there's an article you find only in abstract, you can request it via ILLIAD Interlibrary Loan.
ILLiad request for journal articles are usually quickly filled electronically but you can also restrict your search results to full text only, whether that's in NJSL Discovery or in a database itself. There is typically a Full Text or Full Text Only box you can check.

How to limit results in NJSL Discovery to Full Text

In Discovery, there is also a full text only option from your search results page, on the left side.