The expected quality of an answer on P.SE is that it fully answers the question here. That one can read an answer posted to the question and come away enlightened. That is the key criteria.
The answer may include links to other resources that can act as supplementary reading for someone who wants to go into greater depth on the subject for material that doesn't fit in the answer. That doesn't mean the answer can be absolved of answering the question.
In the help center specific information is given to why some answers are deleted:
Answers that do not fundamentally answer the question may be removed. This includes answers that are:
- barely more than a link to an external site
- not even a partial answer to the actual question
The answer you provided fails on these three tests. It doesn't fundamentally answer the question, it is barely more than links to external resources and it is not even a partial answer to the question - if one removes the links, there is nothing left.