1. Lecture by John F. Nash Jr. An Interesting Equationhttp://web.math.princeton.edu/jfnj/texts_and_graphics/Main.Content/An_Interesting_Equation_and_An_Interesting_Possibility/An_Interesting_Equation/Equation.general.vac/From.PennState/intereq.r.pdf
2. Repulsive gravitation and electron models
3. Repulsive gravitation and inflationary universe models
4. Evolution of the Expanding Universe
5. Smooth Manifolds and Fibre Bundles with Applications to Theoretical Physics;Johannesen,2017