Here I mention just a few books and papers with a full reference and add to the list the names of people who I know have also studied or are studying leverworks, many of them having published papers.

Takayama Masagiku's book which contains a chapter on leverworks has also been translated into Chinese and was published in Taiwan. Because it was never translated and published in English, it remained largely unnoticed outside Asia. Among Rinus Roelofs' studies, I find his spherical structures especially fascinating.