Cody Jones presents an introduction to the the mind of Lejeune Dirichelet, Bernard Riemann, Vladimir Vernadsky and Lyndon LaRouche to a meeting of the Larouche Movement on March 26, 2008

Vernadsky and Dirichlet's Principle, by Lyndon H. LaRouche, Jr. 
https://science.larouchepac.com/publications/dynamis/issues/april08.pdf

Riemann • Topology and Dirichlet's Principle by Jason Ross
https://www.youtube.com/watch?v=hLM4yHHzrS8