The Combat Archaeology of the Fifth-Century BC Kopis: Hoplite Swordsmanship in the Archaic and Classical Periods by Thomas O. Rover.
https://www.researchgate.net/publica...ssical_Periods
There are some nice videos accompanying the research paper on the author's YouTube channel, here:
https://www.youtube.com/@thomasrover9295/videos
In my opinion this is a good example of the "kopis/falcata interchangeability" tendency which makes things confusing for beginners wanting to study these two ancient swords. I really like the reproduction, but it's clearly a falcata, not a kopis.
I also disagree with that statement in the paper that Fig.2 represents two kopis swords at the Met Museum. Unfortunately, the Met Museum seems to state the same here:
https://www.metmuseum.org/art/collection/search/257576
But judging by their shapes, they are Iberian falcatas.
Still, the paper is full of useful data, a recommended read.