Way outside of my field - but from the link above: - https://www.jstor.org/stable/1970165 https://www.jstor.org/stable/1970165 On Contact Manifolds Their refere

Way outside of my field - but from the link above: - https://www.jstor.org/stable/1970165 https://www.jstor.org/stable/1970165 On Contact Manifolds Their reference - https://core.ac.uk/reader/82059800 https://core.ac.uk/reader/82059800 - A Brief History of Contact Geometry and Topology - HansjSrg Geiges Seems solid enough. There's lots of other fun links there. I'm fascinated by this field but I don't have a degree of any kind so ... lots more learning to go!!!