In my thesis, I have added some links as footnotes. I have seen it in some published papers also. But my supervisor tells me to not to add footnotes to them, but add citations.
The links I have added cannot be considered as direct references, therefore, as I think, I should not go for citations for them. They are not from published papers. They are just some links.
This is an example:
Following link gives an example of a published paper with similar footnotes.(page number 4 of the pdf)
I am sort of confused now. What is the methodology I should follow?. Which way is correct?