I have often in the past gave links to worth while reference in my blog articles. However, with the passage of time, those links no longer works. One must do some extra wrok in order to reach the linked content. Let me give an example. I wrote an blog article about the unsung heroines of the Science of Chaos theory, Magaret Hamilton.and Ellen Fetter  https://blog.sciencenet.cn/blog-1565-1183661.html But the link there no longer wroks. But if you google

 "chaor theory and Magaret Hamilton" you can find the reference at https://www.quantamagazine.org/the-hidden-heroines-of-chaos-20190520/