Question about 404 errors

I was trying to look for this paper

[https://www.sciencedirect.com/science/article/abs/pii/S1364032122007444](https://www.sciencedirect.com/science/article/abs/pii/S1364032122007444)

and this paper

[https://www.sciencedirect.com/science/article/abs/pii/S2213138822008207](https://www.sciencedirect.com/science/article/abs/pii/S2213138822008207)

but it says “404 not found” Is there anything that can be done about this?