Basic Principles of the Unified Field Theory of the Second Kind* Vaiclav Hlavaty Indiana University Mathematics Journal 1958 text pdf 10.1512/iumj.1958.7.57022 10.1512/iumj.1958.7.57022 en Indiana Univ. Math. J. 7 (1958) 323 - 354 state-of-the-art mathematics http://iumj.org/access/