A couple of links don't work

Two links did not work for me. These are the replacements that I used: A Note on Two Problems in Connexion with Graphs (Dijkstra 1959) -> https://ir.cwi.nl/pub/9256/9256D.pdf The PageRank Citation Ranking: Bringing Order to the Web (Page 1998) -> https://gwern.net/doc/technology/google/1998-page.pdf