The Wave Equation on a Curved Space-Time (Cambridge
The Wave Equation on a Curved Space-Time (Cambridge,Vortex Dynamics (Cambridge Monographs on Mechanics): Saffman,Amazon | Spinors and Space Time Volume 1 (Cambridge,Spinors and Space-Time: Volume 2, Spinor and Twistor Methods,Spinors and Space-Time: Volume 1, Two-Spinor Calculus and