Well you look up their name and find the institution where they work usually. I'm pretty sure most would be pretty excited that someone is reading their papers lol
Edit: this particular guy though would be kind of hard to contact, since he is kind of dead.
Most scientists will give you the papers if you ask them but yeah IP as it exist now is bullshit
Also scihub, LibGen.
How are you supposed to find their email addresses tho?
Well you look up their name and find the institution where they work usually. I'm pretty sure most would be pretty excited that someone is reading their papers lol
Edit: this particular guy though would be kind of hard to contact, since he is kind of dead.
Pulling out the ouija board to get free access to scientific research