I am doing research on a topic related to an authentication technique. For my own convenience (and for the others), I'm doing all my research and putting everything on a webpage which I'll host on my personal website. I am more organized when there's an anchor link which takes me from text to the bibliography and when everything is online.
It would be an added benefit and convenience if I can also put all the papers I refer to on the same website. Is it permissible to do so? For instance, I heard a professor even encourage putting the paper online (which was originally on arXiv. But then I actually paid for a paper from Springer, and I was wondering if I can use the same logic and just assume that it is legal to do so. My intention is only to aid myself and anyone else interested in my research to access the papers I referred to in my research.